-
Notifications
You must be signed in to change notification settings - Fork 233
/
user.js
1266 lines (1045 loc) · 64.2 KB
/
user.js
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
533
534
535
536
537
538
539
540
541
542
543
544
545
546
547
548
549
550
551
552
553
554
555
556
557
558
559
560
561
562
563
564
565
566
567
568
569
570
571
572
573
574
575
576
577
578
579
580
581
582
583
584
585
586
587
588
589
590
591
592
593
594
595
596
597
598
599
600
601
602
603
604
605
606
607
608
609
610
611
612
613
614
615
616
617
618
619
620
621
622
623
624
625
626
627
628
629
630
631
632
633
634
635
636
637
638
639
640
641
642
643
644
645
646
647
648
649
650
651
652
653
654
655
656
657
658
659
660
661
662
663
664
665
666
667
668
669
670
671
672
673
674
675
676
677
678
679
680
681
682
683
684
685
686
687
688
689
690
691
692
693
694
695
696
697
698
699
700
701
702
703
704
705
706
707
708
709
710
711
712
713
714
715
716
717
718
719
720
721
722
723
724
725
726
727
728
729
730
731
732
733
734
735
736
737
738
739
740
741
742
743
744
745
746
747
748
749
750
751
752
753
754
755
756
757
758
759
760
761
762
763
764
765
766
767
768
769
770
771
772
773
774
775
776
777
778
779
780
781
782
783
784
785
786
787
788
789
790
791
792
793
794
795
796
797
798
799
800
801
802
803
804
805
806
807
808
809
810
811
812
813
814
815
816
817
818
819
820
821
822
823
824
825
826
827
828
829
830
831
832
833
834
835
836
837
838
839
840
841
842
843
844
845
846
847
848
849
850
851
852
853
854
855
856
857
858
859
860
861
862
863
864
865
866
867
868
869
870
871
872
873
874
875
876
877
878
879
880
881
882
883
884
885
886
887
888
889
890
891
892
893
894
895
896
897
898
899
900
901
902
903
904
905
906
907
908
909
910
911
912
913
914
915
916
917
918
919
920
921
922
923
924
925
926
927
928
929
930
931
932
933
934
935
936
937
938
939
940
941
942
943
944
945
946
947
948
949
950
951
952
953
954
955
956
957
958
959
960
961
962
963
964
965
966
967
968
969
970
971
972
973
974
975
976
977
978
979
980
981
982
983
984
985
986
987
988
989
990
991
992
993
994
995
996
997
998
999
1000
//
/******************************************************************************
* user.js *
* https://github.com/pyllyukko/user.js *
******************************************************************************/
/******************************************************************************
* SECTION: HTML5 / APIs / DOM *
******************************************************************************/
// PREF: Disable Service Workers
// https://developer.mozilla.org/en-US/docs/Web/API/Worker
// https://developer.mozilla.org/en-US/docs/Web/API/ServiceWorker_API
// https://wiki.mozilla.org/Firefox/Push_Notifications#Service_Workers
// NOTICE: Disabling ServiceWorkers breaks functionality on some sites (Google Street View...)
// NOTICE: Disabling ServiceWorkers breaks Firefox Sync
// Unknown security implications
// CVE-2016-5259, CVE-2016-2812, CVE-2016-1949, CVE-2016-5287 (fixed)
user_pref("dom.serviceWorkers.enabled", false);
// PREF: Disable web notifications
// https://support.mozilla.org/en-US/questions/1140439
user_pref("dom.webnotifications.enabled", false);
// PREF: Disable DOM timing API
// https://wiki.mozilla.org/Security/Reviews/Firefox/NavigationTimingAPI
// https://www.w3.org/TR/navigation-timing/#privacy
user_pref("dom.enable_performance", false);
// PREF: Disable resource timing API
// https://www.w3.org/TR/resource-timing/#privacy-security
// NOTICE: Disabling resource timing API breaks some DDoS protection pages (Cloudflare)
user_pref("dom.enable_resource_timing", false);
// PREF: Make sure the User Timing API does not provide a new high resolution timestamp
// https://trac.torproject.org/projects/tor/ticket/16336
// https://www.w3.org/TR/2013/REC-user-timing-20131212/#privacy-security
user_pref("dom.enable_user_timing", false);
// PREF: Disable Web Audio API
// https://bugzilla.mozilla.org/show_bug.cgi?id=1288359
// NOTICE: Web Audio API is required for Unity web player/games
user_pref("dom.webaudio.enabled", false);
// PREF: Disable Location-Aware Browsing (geolocation)
// https://www.mozilla.org/en-US/firefox/geolocation/
user_pref("geo.enabled", false);
// PREF: When geolocation is enabled, use Mozilla geolocation service instead of Google
// https://bugzilla.mozilla.org/show_bug.cgi?id=689252
user_pref("geo.wifi.uri", "https://location.services.mozilla.com/v1/geolocate?key=%MOZILLA_API_KEY%");
// PREF: When geolocation is enabled, don't log geolocation requests to the console
user_pref("geo.wifi.logging.enabled", false);
// PREF: Disable raw TCP socket support (mozTCPSocket)
// https://trac.torproject.org/projects/tor/ticket/18863
// https://www.mozilla.org/en-US/security/advisories/mfsa2015-97/
// https://developer.mozilla.org/docs/Mozilla/B2G_OS/API/TCPSocket
user_pref("dom.mozTCPSocket.enabled", false);
// PREF: Disable DOM storage (disabled)
// http://kb.mozillazine.org/Dom.storage.enabled
// https://html.spec.whatwg.org/multipage/webstorage.html
// NOTICE-DISABLED: Disabling DOM storage is known to cause`TypeError: localStorage is null` errors
//user_pref("dom.storage.enabled", false);
// PREF: Disable leaking network/browser connection information via Javascript
// Network Information API provides general information about the system's connection type (WiFi, cellular, etc.)
// https://developer.mozilla.org/en-US/docs/Web/API/Network_Information_API
// https://wicg.github.io/netinfo/#privacy-considerations
// https://bugzilla.mozilla.org/show_bug.cgi?id=960426
user_pref("dom.netinfo.enabled", false);
// PREF: Disable network API (Firefox < 32)
// https://developer.mozilla.org/en-US/docs/Web/API/Connection/onchange
// https://www.torproject.org/projects/torbrowser/design/#fingerprinting-defenses
user_pref("dom.network.enabled", false);
// PREF: Disable WebRTC entirely to prevent leaking internal IP addresses (Firefox < 42)
// NOTICE: Disabling WebRTC breaks peer-to-peer file sharing tools (reep.io ...)
user_pref("media.peerconnection.enabled", false);
// PREF: Don't reveal your internal IP when WebRTC is enabled (Firefox >= 42)
// https://wiki.mozilla.org/Media/WebRTC/Privacy
// https://github.com/beefproject/beef/wiki/Module%3A-Get-Internal-IP-WebRTC
user_pref("media.peerconnection.ice.default_address_only", true); // Firefox 42-51
user_pref("media.peerconnection.ice.no_host", true); // Firefox >= 52
// PREF: Disable WebRTC getUserMedia, screen sharing, audio capture, video capture
// https://wiki.mozilla.org/Media/getUserMedia
// https://blog.mozilla.org/futurereleases/2013/01/12/capture-local-camera-and-microphone-streams-with-getusermedia-now-enabled-in-firefox/
// https://developer.mozilla.org/en-US/docs/Web/API/Navigator
user_pref("media.navigator.enabled", false);
user_pref("media.navigator.video.enabled", false);
user_pref("media.getusermedia.screensharing.enabled", false);
user_pref("media.getusermedia.audiocapture.enabled", false);
// PREF: Disable battery API (Firefox < 52)
// https://developer.mozilla.org/en-US/docs/Web/API/BatteryManager
// https://bugzilla.mozilla.org/show_bug.cgi?id=1313580
user_pref("dom.battery.enabled", false);
// PREF: Disable telephony API
// https://wiki.mozilla.org/WebAPI/Security/WebTelephony
user_pref("dom.telephony.enabled", false);
// PREF: Disable "beacon" asynchronous HTTP transfers (used for analytics)
// https://developer.mozilla.org/en-US/docs/Web/API/navigator.sendBeacon
user_pref("beacon.enabled", false);
// PREF: Disable clipboard event detection (onCut/onCopy/onPaste) via Javascript
// https://web.archive.org/web/20210416195937/https://developer.mozilla.org/en-US/docs/Mozilla/Preferences/Preference_reference/dom.event.clipboardevents.enabled
// https://github.com/pyllyukko/user.js/issues/287
// NOTICE: Disabling clipboard events breaks Ctrl+C/X/V copy/cut/paste functionaility in JS-based web applications (Google Docs...)
user_pref("dom.event.clipboardevents.enabled", false);
// PREF: Disable "copy to clipboard" functionality via Javascript (Firefox >= 41)
// https://hg.mozilla.org/mozilla-central/rev/2f9f8ea4b9c3
// https://github.com/pyllyukko/user.js/issues/287
// NOTICE: Disabling clipboard operations will break legitimate JS-based "copy to clipboard" functionality
user_pref("dom.allow_cut_copy", false);
// PREF: Disable speech recognition
// https://dvcs.w3.org/hg/speech-api/raw-file/tip/speechapi.html
// https://developer.mozilla.org/en-US/docs/Web/API/SpeechRecognition
// https://wiki.mozilla.org/HTML5_Speech_API
user_pref("media.webspeech.recognition.enable", false);
// PREF: Disable speech synthesis
// https://developer.mozilla.org/en-US/docs/Web/API/SpeechSynthesis
user_pref("media.webspeech.synth.enabled", false);
// PREF: Disable sensor API
// https://wiki.mozilla.org/Sensor_API
user_pref("device.sensors.enabled", false);
// PREF: Disable pinging URIs specified in HTML <a> ping= attributes
// http://kb.mozillazine.org/Browser.send_pings
user_pref("browser.send_pings", false);
// PREF: When browser pings are enabled, only allow pinging the same host as the origin page
// http://kb.mozillazine.org/Browser.send_pings.require_same_host
user_pref("browser.send_pings.require_same_host", true);
// PREF: Disable IndexedDB (disabled)
// https://developer.mozilla.org/en-US/docs/IndexedDB
// https://en.wikipedia.org/wiki/Indexed_Database_API
// https://wiki.mozilla.org/Security/Reviews/Firefox4/IndexedDB_Security_Review
// http://forums.mozillazine.org/viewtopic.php?p=13842047
// https://github.com/pyllyukko/user.js/issues/8
// NOTICE-DISABLED: IndexedDB could be used for tracking purposes, but is required for some add-ons to work (notably uBlock), so is left enabled
//user_pref("dom.indexedDB.enabled", false);
// TODO: "Access Your Location" "Maintain Offline Storage" "Show Notifications"
// PREF: Disable gamepad API to prevent USB device enumeration
// https://www.w3.org/TR/gamepad/
// https://trac.torproject.org/projects/tor/ticket/13023
user_pref("dom.gamepad.enabled", false);
// PREF: Disable virtual reality devices APIs
// https://developer.mozilla.org/en-US/Firefox/Releases/36#Interfaces.2FAPIs.2FDOM
// https://developer.mozilla.org/en-US/docs/Web/API/WebVR_API
user_pref("dom.vr.enabled", false);
// PREF: Disable vibrator API
user_pref("dom.vibrator.enabled", false);
// PREF: Disable Archive API (Firefox < 54)
// https://wiki.mozilla.org/WebAPI/ArchiveAPI
// https://bugzilla.mozilla.org/show_bug.cgi?id=1342361
user_pref("dom.archivereader.enabled", false);
// PREF: Disable webGL
// https://en.wikipedia.org/wiki/WebGL
// https://www.contextis.com/resources/blog/webgl-new-dimension-browser-exploitation/
// NOTICE: Disabling WebGL breaks WebGL-based websites/applications (windy, meteoblue...)
user_pref("webgl.disabled", true);
// PREF: When webGL is enabled, use the minimum capability mode
user_pref("webgl.min_capability_mode", true);
// PREF: When webGL is enabled, disable webGL extensions
// https://developer.mozilla.org/en-US/docs/Web/API/WebGL_API#WebGL_debugging_and_testing
user_pref("webgl.disable-extensions", true);
// PREF: When webGL is enabled, force enabling it even when layer acceleration is not supported
// https://trac.torproject.org/projects/tor/ticket/18603
user_pref("webgl.disable-fail-if-major-performance-caveat", true);
// PREF: When webGL is enabled, do not expose information about the graphics driver
// https://bugzilla.mozilla.org/show_bug.cgi?id=1171228
// https://developer.mozilla.org/en-US/docs/Web/API/WEBGL_debug_renderer_info
user_pref("webgl.enable-debug-renderer-info", false);
// somewhat related...
//user_pref("pdfjs.enableWebGL", false);
// PREF: Spoof dual-core CPU
// https://trac.torproject.org/projects/tor/ticket/21675
// https://bugzilla.mozilla.org/show_bug.cgi?id=1360039
user_pref("dom.maxHardwareConcurrency", 2);
// PREF: Disable WebAssembly
// https://webassembly.org/
// https://en.wikipedia.org/wiki/WebAssembly
// https://trac.torproject.org/projects/tor/ticket/21549
// NOTICE: WebAssembly is required for Unity web player/games
user_pref("javascript.options.wasm", false);
/******************************************************************************
* SECTION: Misc *
******************************************************************************/
// PREF: Disable face detection
user_pref("camera.control.face_detection.enabled", false);
// PREF: Disable GeoIP lookup on your address to set default search engine region
// https://trac.torproject.org/projects/tor/ticket/16254
// https://support.mozilla.org/en-US/kb/how-stop-firefox-making-automatic-connections#w_geolocation-for-default-search-engine
user_pref("browser.search.countryCode", "US");
user_pref("browser.search.region", "US");
user_pref("browser.search.geoip.url", "");
// PREF: Set Accept-Language HTTP header to en-US regardless of Firefox localization
// https://developer.mozilla.org/en-US/docs/Web/HTTP/Headers/Accept-Language
user_pref("intl.accept_languages", "en-US, en");
// PREF: Don't use OS values to determine locale, force using Firefox locale setting
// http://kb.mozillazine.org/Intl.locale.matchOS
user_pref("intl.locale.matchOS", false);
// Use LANG environment variable to choose locale (disabled)
//pref("intl.locale.requested", "");
// PREF: Don't use Mozilla-provided location-specific search engines
user_pref("browser.search.geoSpecificDefaults", false);
// PREF: Do not automatically send selection to clipboard on some Linux platforms
// http://kb.mozillazine.org/Clipboard.autocopy
user_pref("clipboard.autocopy", false);
// PREF: Prevent leaking application locale/date format using JavaScript
// https://bugzilla.mozilla.org/show_bug.cgi?id=867501
// https://hg.mozilla.org/mozilla-central/rev/52d635f2b33d
user_pref("javascript.use_us_english_locale", true);
// PREF: Do not submit invalid URIs entered in the address bar to the default search engine
// http://kb.mozillazine.org/Keyword.enabled
user_pref("keyword.enabled", false);
// PREF: Don't trim HTTP off of URLs in the address bar.
// https://bugzilla.mozilla.org/show_bug.cgi?id=665580
user_pref("browser.urlbar.trimURLs", false);
// PREF: Disable preloading of autocomplete URLs.
// https://wiki.mozilla.org/Privacy/Privacy_Task_Force/firefox_about_config_privacy_tweeks
user_pref("browser.urlbar.speculativeConnect.enabled", false);
// PREF: Don't try to guess domain names when entering an invalid domain name in URL bar
// http://www-archive.mozilla.org/docs/end-user/domain-guessing.html
user_pref("browser.fixup.alternate.enabled", false);
// PREF: When browser.fixup.alternate.enabled is enabled, strip password from 'user:password@...' URLs
// https://github.com/pyllyukko/user.js/issues/290#issuecomment-303560851
user_pref("browser.fixup.hide_user_pass", true);
// PREF: Send DNS request through SOCKS when SOCKS proxying is in use
// https://trac.torproject.org/projects/tor/wiki/doc/TorifyHOWTO/WebBrowsers
user_pref("network.proxy.socks_remote_dns", true);
// PREF: Don't monitor OS online/offline connection state
// https://trac.torproject.org/projects/tor/ticket/18945
user_pref("network.manage-offline-status", false);
// PREF: Enforce Mixed Active Content Blocking
// https://support.mozilla.org/t5/Protect-your-privacy/Mixed-content-blocking-in-Firefox/ta-p/10990
// https://developer.mozilla.org/en-US/docs/Site_Compatibility_for_Firefox_23#Non-SSL_contents_on_SSL_pages_are_blocked_by_default
// https://blog.mozilla.org/tanvi/2013/04/10/mixed-content-blocking-enabled-in-firefox-23/
user_pref("security.mixed_content.block_active_content", true);
// PREF: Enforce Mixed Passive Content blocking (a.k.a. Mixed Display Content)
// NOTICE: Enabling Mixed Display Content blocking can prevent images/styles... from loading properly when connection to the website is only partially secured
user_pref("security.mixed_content.block_display_content", true);
// PREF: Disable JAR from opening Unsafe File Types
// http://kb.mozillazine.org/Network.jar.open-unsafe-types
// CIS Mozilla Firefox 24 ESR v1.0.0 - 3.7
user_pref("network.jar.open-unsafe-types", false);
// CIS 2.7.4 Disable Scripting of Plugins by JavaScript
// http://forums.mozillazine.org/viewtopic.php?f=7&t=153889
user_pref("security.xpconnect.plugin.unrestricted", false);
// PREF: Set File URI Origin Policy
// http://kb.mozillazine.org/Security.fileuri.strict_origin_policy
// CIS Mozilla Firefox 24 ESR v1.0.0 - 3.8
user_pref("security.fileuri.strict_origin_policy", true);
// PREF: Disable Displaying Javascript in History URLs
// http://kb.mozillazine.org/Browser.urlbar.filter.javascript
// CIS 2.3.6
user_pref("browser.urlbar.filter.javascript", true);
// PREF: Disable asm.js
// http://asmjs.org/
// https://www.mozilla.org/en-US/security/advisories/mfsa2015-29/
// https://www.mozilla.org/en-US/security/advisories/mfsa2015-50/
// https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2015-2712
user_pref("javascript.options.asmjs", false);
// PREF: Disable SVG in OpenType fonts
// https://wiki.mozilla.org/SVGOpenTypeFonts
// https://github.com/iSECPartners/publications/tree/master/reports/Tor%20Browser%20Bundle
user_pref("gfx.font_rendering.opentype_svg.enabled", false);
// PREF: Disable in-content SVG rendering (Firefox >= 53) (disabled)
// NOTICE-DISABLED: Disabling SVG support breaks many UI elements on many sites
// https://bugzilla.mozilla.org/show_bug.cgi?id=1216893
// https://github.com/iSECPartners/publications/raw/master/reports/Tor%20Browser%20Bundle/Tor%20Browser%20Bundle%20-%20iSEC%20Deliverable%201.3.pdf#16
//user_pref("svg.disabled", true);
// PREF: Disable video stats to reduce fingerprinting threat
// https://bugzilla.mozilla.org/show_bug.cgi?id=654550
// https://github.com/pyllyukko/user.js/issues/9#issuecomment-100468785
// https://github.com/pyllyukko/user.js/issues/9#issuecomment-148922065
user_pref("media.video_stats.enabled", false);
// PREF: Don't reveal build ID
// Value taken from Tor Browser
// https://bugzilla.mozilla.org/show_bug.cgi?id=583181
user_pref("general.buildID.override", "20100101");
user_pref("browser.startup.homepage_override.buildID", "20100101");
// PREF: Don't use document specified fonts to prevent installed font enumeration (fingerprinting)
// https://github.com/pyllyukko/user.js/issues/395
// https://browserleaks.com/fonts
// https://github.com/pyllyukko/user.js/issues/120
user_pref("browser.display.use_document_fonts", 0);
// PREF: Enable only whitelisted URL protocol handlers
// http://kb.mozillazine.org/Network.protocol-handler.external-default
// http://kb.mozillazine.org/Network.protocol-handler.warn-external-default
// http://kb.mozillazine.org/Network.protocol-handler.expose.%28protocol%29
// https://news.ycombinator.com/item?id=13047883
// https://bugzilla.mozilla.org/show_bug.cgi?id=167475
// https://github.com/pyllyukko/user.js/pull/285#issuecomment-298124005
// NOTICE: Disabling nonessential protocols breaks all interaction with custom protocols such as mailto:, irc:, magnet: ... and breaks opening third-party mail/messaging/torrent/... clients when clicking on links with these protocols
// TODO: Add externally-handled protocols from Windows 8.1 and Windows 10 (currently contains protocols only from Linux and Windows 7) that might pose a similar threat (see e.g. https://news.ycombinator.com/item?id=13044991)
// TODO: Add externally-handled protocols from Mac OS X that might pose a similar threat (see e.g. https://news.ycombinator.com/item?id=13044991)
// If you want to enable a protocol, set network.protocol-handler.expose.(protocol) to true and network.protocol-handler.external.(protocol) to:
// * true, if the protocol should be handled by an external application
// * false, if the protocol should be handled internally by Firefox
user_pref("network.protocol-handler.warn-external-default", true);
user_pref("network.protocol-handler.external.http", false);
user_pref("network.protocol-handler.external.https", false);
user_pref("network.protocol-handler.external.javascript", false);
user_pref("network.protocol-handler.external.moz-extension", false);
user_pref("network.protocol-handler.external.ftp", false);
user_pref("network.protocol-handler.external.file", false);
user_pref("network.protocol-handler.external.about", false);
user_pref("network.protocol-handler.external.chrome", false);
user_pref("network.protocol-handler.external.blob", false);
user_pref("network.protocol-handler.external.data", false);
user_pref("network.protocol-handler.expose-all", false);
user_pref("network.protocol-handler.expose.http", true);
user_pref("network.protocol-handler.expose.https", true);
user_pref("network.protocol-handler.expose.javascript", true);
user_pref("network.protocol-handler.expose.moz-extension", true);
user_pref("network.protocol-handler.expose.ftp", true);
user_pref("network.protocol-handler.expose.file", true);
user_pref("network.protocol-handler.expose.about", true);
user_pref("network.protocol-handler.expose.chrome", true);
user_pref("network.protocol-handler.expose.blob", true);
user_pref("network.protocol-handler.expose.data", true);
/******************************************************************************
* SECTION: Extensions / plugins *
******************************************************************************/
// PREF: Ensure you have a security delay when installing add-ons (milliseconds)
// http://kb.mozillazine.org/Disable_extension_install_delay_-_Firefox
// http://www.squarefree.com/2004/07/01/race-conditions-in-security-dialogs/
user_pref("security.dialog_enable_delay", 1000);
// PREF: Require signatures
// https://wiki.mozilla.org/Addons/Extension_Signing
//user_pref("xpinstall.signatures.required", true);
// PREF: Opt-out of add-on metadata updates
// https://blog.mozilla.org/addons/how-to-opt-out-of-add-on-metadata-updates/
user_pref("extensions.getAddons.cache.enabled", false);
// PREF: Opt-out of themes (Persona) updates
// https://support.mozilla.org/t5/Firefox/how-do-I-prevent-autoamtic-updates-in-a-50-user-environment/td-p/144287
user_pref("lightweightThemes.update.enabled", false);
// PREF: Disable Flash Player NPAPI plugin
// http://kb.mozillazine.org/Flash_plugin
user_pref("plugin.state.flash", 0);
// PREF: Disable Java NPAPI plugin
user_pref("plugin.state.java", 0);
// PREF: Disable sending Flash Player crash reports
user_pref("dom.ipc.plugins.flash.subprocess.crashreporter.enabled", false);
// PREF: When Flash crash reports are enabled, don't send the visited URL in the crash report
user_pref("dom.ipc.plugins.reportCrashURL", false);
// PREF: When Flash is enabled, download and use Mozilla SWF URIs blocklist
// https://bugzilla.mozilla.org/show_bug.cgi?id=1237198
// https://github.com/mozilla-services/shavar-plugin-blocklist
user_pref("browser.safebrowsing.blockedURIs.enabled", true);
// PREF: Disable Gnome Shell Integration NPAPI plugin
user_pref("plugin.state.libgnome-shell-browser-plugin", 0);
// PREF: Disable the bundled OpenH264 video codec (disabled)
// http://forums.mozillazine.org/viewtopic.php?p=13845077&sid=28af2622e8bd8497b9113851676846b1#p13845077
//user_pref("media.gmp-provider.enabled", false);
// PREF: Enable plugins click-to-play
// https://wiki.mozilla.org/Firefox/Click_To_Play
// https://blog.mozilla.org/security/2012/10/11/click-to-play-plugins-blocklist-style/
user_pref("plugins.click_to_play", true);
// PREF: Updates addons automatically
// https://blog.mozilla.org/addons/how-to-turn-off-add-on-updates/
user_pref("extensions.update.enabled", true);
// PREF: Enable add-on and certificate blocklists (OneCRL) from Mozilla
// https://wiki.mozilla.org/Blocklisting
// https://blocked.cdn.mozilla.net/
// http://kb.mozillazine.org/Extensions.blocklist.enabled
// http://kb.mozillazine.org/Extensions.blocklist.url
// https://blog.mozilla.org/security/2015/03/03/revoking-intermediate-certificates-introducing-onecrl/
// Updated at interval defined in extensions.blocklist.interval (default: 86400)
user_pref("extensions.blocklist.enabled", true);
user_pref("services.blocklist.update_enabled", true);
// PREF: Decrease system information leakage to Mozilla blocklist update servers
// https://trac.torproject.org/projects/tor/ticket/16931
user_pref("extensions.blocklist.url", "https://blocklist.addons.mozilla.org/blocklist/3/%APP_ID%/%APP_VERSION%/");
// PREF: Disable system add-on updates (hidden & always-enabled add-ons from Mozilla)
// https://firefox-source-docs.mozilla.org/toolkit/mozapps/extensions/addon-manager/SystemAddons.html
// https://blog.mozilla.org/data/2018/08/20/effectively-measuring-search-in-firefox/
// https://github.com/pyllyukko/user.js/issues/419
// https://dxr.mozilla.org/mozilla-central/source/toolkit/mozapps/extensions/AddonManager.jsm#1248-1257
// NOTICE: Disabling system add-on updates prevents Mozilla from "hotfixing" your browser to patch critical problems (one possible use case from the documentation)
user_pref("extensions.systemAddon.update.enabled", false);
/******************************************************************************
* SECTION: Firefox (anti-)features / components * *
******************************************************************************/
// PREF: Disable Extension recommendations (Firefox >= 65)
// https://support.mozilla.org/en-US/kb/extension-recommendations
user_pref("browser.newtabpage.activity-stream.asrouter.userprefs.cfr", false);
// PREF: Trusted Recursive Resolver (DNS-over-HTTPS) (disabled)
// https://wiki.mozilla.org/Trusted_Recursive_Resolver
//user_pref("network.trr.mode", 0);
// PREF: Disable WebIDE
// https://trac.torproject.org/projects/tor/ticket/16222
// https://developer.mozilla.org/docs/Tools/WebIDE
user_pref("devtools.webide.enabled", false);
user_pref("devtools.webide.autoinstallADBHelper", false);
user_pref("devtools.webide.autoinstallFxdtAdapters", false);
// PREF: Disable remote debugging
// https://developer.mozilla.org/en-US/docs/Tools/Remote_Debugging/Debugging_Firefox_Desktop
// https://developer.mozilla.org/en-US/docs/Tools/Tools_Toolbox#Advanced_settings
user_pref("devtools.debugger.remote-enabled", false);
user_pref("devtools.chrome.enabled", false);
user_pref("devtools.debugger.force-local", true);
// PREF: Disable Mozilla telemetry/experiments
// https://wiki.mozilla.org/Platform/Features/Telemetry
// https://wiki.mozilla.org/Privacy/Reviews/Telemetry
// https://wiki.mozilla.org/Telemetry
// https://www.mozilla.org/en-US/legal/privacy/firefox.html#telemetry
// https://support.mozilla.org/t5/Firefox-crashes/Mozilla-Crash-Reporter/ta-p/1715
// https://wiki.mozilla.org/Security/Reviews/Firefox6/ReviewNotes/telemetry
// https://gecko.readthedocs.io/en/latest/browser/experiments/experiments/manifest.html
// https://wiki.mozilla.org/Telemetry/Experiments
// https://support.mozilla.org/en-US/questions/1197144
// https://firefox-source-docs.mozilla.org/toolkit/components/telemetry/telemetry/internals/preferences.html#id1
user_pref("toolkit.telemetry.enabled", false);
user_pref("toolkit.telemetry.unified", false);
user_pref("toolkit.telemetry.archive.enabled", false);
user_pref("experiments.supported", false);
user_pref("experiments.enabled", false);
user_pref("experiments.manifest.uri", "");
// PREF: Disallow Necko to do A/B testing
// https://trac.torproject.org/projects/tor/ticket/13170
user_pref("network.allow-experiments", false);
// PREF: Disable sending Firefox crash reports to Mozilla servers
// https://wiki.mozilla.org/Breakpad
// http://kb.mozillazine.org/Breakpad
// https://dxr.mozilla.org/mozilla-central/source/toolkit/crashreporter
// https://bugzilla.mozilla.org/show_bug.cgi?id=411490
// A list of submitted crash reports can be found at about:crashes
user_pref("breakpad.reportURL", "");
// PREF: Disable sending reports of tab crashes to Mozilla (about:tabcrashed), don't nag user about unsent crash reports
// https://hg.mozilla.org/mozilla-central/file/tip/browser/app/profile/firefox.js
user_pref("browser.tabs.crashReporting.sendReport", false);
user_pref("browser.crashReports.unsubmittedCheck.enabled", false);
// PREF: Disable FlyWeb (discovery of LAN/proximity IoT devices that expose a Web interface)
// https://wiki.mozilla.org/FlyWeb
// https://wiki.mozilla.org/FlyWeb/Security_scenarios
// https://docs.google.com/document/d/1eqLb6cGjDL9XooSYEEo7mE-zKQ-o-AuDTcEyNhfBMBM/edit
// http://www.ghacks.net/2016/07/26/firefox-flyweb
user_pref("dom.flyweb.enabled", false);
// PREF: Disable the UITour backend
// https://trac.torproject.org/projects/tor/ticket/19047#comment:3
user_pref("browser.uitour.enabled", false);
// PREF: Enable Firefox Tracking Protection
// https://wiki.mozilla.org/Security/Tracking_protection
// https://support.mozilla.org/en-US/kb/tracking-protection-firefox
// https://support.mozilla.org/en-US/kb/tracking-protection-pbm
// https://kontaxis.github.io/trackingprotectionfirefox/
// https://feeding.cloud.geek.nz/posts/how-tracking-protection-works-in-firefox/
user_pref("privacy.trackingprotection.enabled", true);
user_pref("privacy.trackingprotection.pbmode.enabled", true);
// PREF: Enable contextual identity Containers feature (Firefox >= 52)
// NOTICE: Containers are not available in Private Browsing mode
// https://wiki.mozilla.org/Security/Contextual_Identity_Project/Containers
user_pref("privacy.userContext.enabled", true);
// PREF: Enable Firefox's anti-fingerprinting mode ("resist fingerprinting" or RFP) (Tor Uplift project)
// https://wiki.mozilla.org/Security/Tor_Uplift/Tracking
// https://bugzilla.mozilla.org/show_bug.cgi?id=1333933
// https://wiki.mozilla.org/Security/Fingerprinting
// NOTICE: RFP breaks some keyboard shortcuts used in certain websites (see #443)
// NOTICE: RFP changes your time zone
// NOTICE: RFP breaks some DDoS protection pages (Cloudflare)
user_pref("privacy.resistFingerprinting", true);
// PREF: disable mozAddonManager Web API [FF57+]
// https://bugzilla.mozilla.org/buglist.cgi?bug_id=1384330
// https://bugzilla.mozilla.org/buglist.cgi?bug_id=1406795
// https://bugzilla.mozilla.org/buglist.cgi?bug_id=1415644
// https://bugzilla.mozilla.org/buglist.cgi?bug_id=1453988
// https://trac.torproject.org/projects/tor/ticket/26114
user_pref("privacy.resistFingerprinting.block_mozAddonManager", true);
user_pref("extensions.webextensions.restrictedDomains", "");
// PREF: enable RFP letterboxing / resizing of inner window [FF67+] (disabled)
// https://bugzilla.mozilla.org/1407366
//user_pref("privacy.resistFingerprinting.letterboxing", true);
//user_pref("privacy.resistFingerprinting.letterboxing.dimensions", "800x600, 1000x1000, 1600x900");
// PREF: disable showing about:blank/maximized window as soon as possible during startup [FF60+]
// https://bugzilla.mozilla.org/1448423
user_pref("browser.startup.blankWindow", false);
// PREF: Disable the built-in PDF viewer
// https://web.nvd.nist.gov/view/vuln/detail?vulnId=CVE-2015-2743
// https://blog.mozilla.org/security/2015/08/06/firefox-exploit-found-in-the-wild/
// https://www.mozilla.org/en-US/security/advisories/mfsa2015-69/
user_pref("pdfjs.disabled", true);
// PREF: Disable collection/sending of the health report (healthreport.sqlite*)
// https://support.mozilla.org/en-US/kb/firefox-health-report-understand-your-browser-perf
// https://gecko.readthedocs.org/en/latest/toolkit/components/telemetry/telemetry/preferences.html
user_pref("datareporting.healthreport.uploadEnabled", false);
user_pref("datareporting.healthreport.service.enabled", false);
user_pref("datareporting.policy.dataSubmissionEnabled", false);
// "Allow Firefox to make personalized extension recommendations"
user_pref("browser.discovery.enabled", false);
// PREF: Disable Shield/Heartbeat/Normandy (Mozilla user rating telemetry)
// https://wiki.mozilla.org/Advocacy/heartbeat
// https://trac.torproject.org/projects/tor/ticket/19047
// https://trac.torproject.org/projects/tor/ticket/18738
// https://wiki.mozilla.org/Firefox/Shield
// https://github.com/mozilla/normandy
// https://support.mozilla.org/en-US/kb/shield
// https://bugzilla.mozilla.org/show_bug.cgi?id=1370801
// https://wiki.mozilla.org/Firefox/Normandy/PreferenceRollout
user_pref("app.normandy.enabled", false);
user_pref("app.normandy.api_url", "");
user_pref("extensions.shield-recipe-client.enabled", false);
user_pref("app.shield.optoutstudies.enabled", false);
// PREF: Disable Firefox Hello (disabled) (Firefox < 49)
// https://wiki.mozilla.org/Loop
// https://support.mozilla.org/t5/Chat-and-share/Support-for-Hello-discontinued-in-Firefox-49/ta-p/37946
// NOTICE-DISABLED: Firefox Hello requires setting `media.peerconnection.enabled` and `media.getusermedia.screensharing.enabled` to true, `security.OCSP.require` to false to work.
//user_pref("loop.enabled", false);
// PREF: Disable Firefox Hello metrics collection
// https://groups.google.com/d/topic/mozilla.dev.platform/nyVkCx-_sFw/discussion
user_pref("loop.logDomains", false);
// PREF: Enable Auto Update (disabled)
// NOTICE: Fully automatic updates are disabled and left to package management systems on Linux. Windows users may want to change this setting.
// CIS 2.1.1
//user_pref("app.update.auto", true);
// PREF: Enforce checking for Firefox updates
// http://kb.mozillazine.org/App.update.enabled
// NOTICE: Update check page might incorrectly report Firefox ESR as out-of-date
user_pref("app.update.enabled", true);
// PREF: Enable blocking reported web forgeries
// https://wiki.mozilla.org/Security/Safe_Browsing
// http://kb.mozillazine.org/Safe_browsing
// https://support.mozilla.org/en-US/kb/how-does-phishing-and-malware-protection-work
// http://forums.mozillazine.org/viewtopic.php?f=39&t=2711237&p=12896849#p12896849
// CIS 2.3.4
user_pref("browser.safebrowsing.enabled", true); // Firefox < 50
user_pref("browser.safebrowsing.phishing.enabled", true); // firefox >= 50
// PREF: Enable blocking reported attack sites
// http://kb.mozillazine.org/Browser.safebrowsing.malware.enabled
// CIS 2.3.5
user_pref("browser.safebrowsing.malware.enabled", true);
// PREF: Disable querying Google Application Reputation database for downloaded binary files
// https://www.mozilla.org/en-US/firefox/39.0/releasenotes/
// https://wiki.mozilla.org/Security/Application_Reputation
user_pref("browser.safebrowsing.downloads.remote.enabled", false);
// PREF: Disable Pocket
// https://support.mozilla.org/en-US/kb/save-web-pages-later-pocket-firefox
// https://github.com/pyllyukko/user.js/issues/143
user_pref("browser.pocket.enabled", false);
user_pref("extensions.pocket.enabled", false);
// PREF: Disable "Recommended by Pocket" in Firefox Quantum
user_pref("browser.newtabpage.activity-stream.feeds.section.topstories", false);
// PREF: Enable Global Privacy Control (GPC) (Firefox >= 120)
// https://support.mozilla.org/1/firefox/126.0/Linux/en-US/global-privacy-control
// https://developer.mozilla.org/en-US/docs/Web/HTTP/Headers/Sec-GPC
user_pref("privacy.globalprivacycontrol.enabled", true);
/******************************************************************************
* SECTION: Automatic connections *
******************************************************************************/
// PREF: Limit the connection keep-alive timeout to 15 seconds (disabled)
// https://github.com/pyllyukko/user.js/issues/387
// http://kb.mozillazine.org/Network.http.keep-alive.timeout
// https://httpd.apache.org/docs/current/mod/core.html#keepalivetimeout
//user_pref("network.http.keep-alive.timeout", 15);
// PREF: Disable prefetching of <link rel="next"> URLs
// http://kb.mozillazine.org/Network.prefetch-next
// https://developer.mozilla.org/en-US/docs/Web/HTTP/Link_prefetching_FAQ#Is_there_a_preference_to_disable_link_prefetching.3F
user_pref("network.prefetch-next", false);
// PREF: Disable DNS prefetching
// http://kb.mozillazine.org/Network.dns.disablePrefetch
// https://developer.mozilla.org/en-US/docs/Web/HTTP/Controlling_DNS_prefetching
user_pref("network.dns.disablePrefetch", true);
user_pref("network.dns.disablePrefetchFromHTTPS", true);
// PREF: Disable the predictive service (Necko)
// https://wiki.mozilla.org/Privacy/Reviews/Necko
user_pref("network.predictor.enabled", false);
// PREF: Reject .onion hostnames before passing the to DNS
// https://bugzilla.mozilla.org/show_bug.cgi?id=1228457
// RFC 7686
user_pref("network.dns.blockDotOnion", true);
// PREF: Disable search suggestions in the search bar
// http://kb.mozillazine.org/Browser.search.suggest.enabled
user_pref("browser.search.suggest.enabled", false);
// PREF: Disable "Show search suggestions in location bar results"
user_pref("browser.urlbar.suggest.searches", false);
// PREF: When using the location bar, don't suggest URLs from browsing history
user_pref("browser.urlbar.suggest.history", false);
// PREF: Disable Firefox Suggest
// https://www.ghacks.net/2021/09/09/how-to-disable-firefox-suggest/
// https://support.mozilla.org/en-US/kb/navigate-web-faster-firefox-suggest
user_pref("browser.urlbar.groupLabels.enabled", false); // Firefox >= 93
// PREF: Disable SSDP
// https://bugzilla.mozilla.org/show_bug.cgi?id=1111967
user_pref("browser.casting.enabled", false);
// PREF: Disable automatic downloading of OpenH264 codec
// https://support.mozilla.org/en-US/kb/how-stop-firefox-making-automatic-connections#w_media-capabilities
// https://andreasgal.com/2014/10/14/openh264-now-in-firefox/
user_pref("media.gmp-gmpopenh264.enabled", false);
user_pref("media.gmp-manager.url", "");
// PREF: Disable speculative pre-connections
// https://support.mozilla.org/en-US/kb/how-stop-firefox-making-automatic-connections#w_speculative-pre-connections
// https://bugzilla.mozilla.org/show_bug.cgi?id=814169
user_pref("network.http.speculative-parallel-limit", 0);
// PREF: Disable downloading homepage snippets/messages from Mozilla
// https://support.mozilla.org/en-US/kb/how-stop-firefox-making-automatic-connections#w_mozilla-content
// https://wiki.mozilla.org/Firefox/Projects/Firefox_Start/Snippet_Service
user_pref("browser.aboutHomeSnippets.updateUrl", "");
// PREF: Never check updates for search engines
// https://support.mozilla.org/en-US/kb/how-stop-firefox-making-automatic-connections#w_auto-update-checking
user_pref("browser.search.update", false);
// PREF: Disable automatic captive portal detection (Firefox >= 52.0)
// https://support.mozilla.org/en-US/questions/1157121
user_pref("network.captive-portal-service.enabled", false);
// PREF: Disable (parts of?) "TopSites"
user_pref("browser.topsites.contile.enabled", false);
user_pref("browser.newtabpage.activity-stream.feeds.topsites", false);
user_pref("browser.newtabpage.activity-stream.showSponsoredTopSites", false);
/******************************************************************************
* SECTION: HTTP *
******************************************************************************/
// PREF: Disallow NTLMv1
// https://bugzilla.mozilla.org/show_bug.cgi?id=828183
user_pref("network.negotiate-auth.allow-insecure-ntlm-v1", false);
// it is still allowed through HTTPS. uncomment the following to disable it completely.
//user_pref("network.negotiate-auth.allow-insecure-ntlm-v1-https", false);
// PREF: Enable CSP 1.1 script-nonce directive support
// https://bugzilla.mozilla.org/show_bug.cgi?id=855326
user_pref("security.csp.experimentalEnabled", true);
// PREF: Enable Content Security Policy (CSP)
// https://developer.mozilla.org/en-US/docs/Web/Security/CSP/Introducing_Content_Security_Policy
// https://developer.mozilla.org/en-US/docs/Web/HTTP/CSP
user_pref("security.csp.enable", true);
// PREF: Enable Subresource Integrity
// https://developer.mozilla.org/en-US/docs/Web/Security/Subresource_Integrity
// https://wiki.mozilla.org/Security/Subresource_Integrity
user_pref("security.sri.enable", true);
// PREF: DNT HTTP header (disabled)
// https://www.mozilla.org/en-US/firefox/dnt/
// https://en.wikipedia.org/wiki/Do_not_track_header
// https://dnt-dashboard.mozilla.org
// https://github.com/pyllyukko/user.js/issues/11
// NOTICE: Do No Track must be enabled manually
//user_pref("privacy.donottrackheader.enabled", true);
// PREF: Send a referer header with the target URI as the source (disabled)
// https://bugzilla.mozilla.org/show_bug.cgi?id=822869
// https://github.com/pyllyukko/user.js/issues/227
// NOTICE-DISABLED: Spoofing referers breaks functionality on websites relying on authentic referer headers
// NOTICE-DISABLED: Spoofing referers breaks visualisation of 3rd-party sites on the Lightbeam addon
// NOTICE-DISABLED: Spoofing referers disables CSRF protection on some login pages not implementing origin-header/cookie+token based CSRF protection
// TODO: https://github.com/pyllyukko/user.js/issues/94, commented-out XOriginPolicy/XOriginTrimmingPolicy = 2 prefs
//user_pref("network.http.referer.spoofSource", true);
// PREF: Don't send referer headers when following links across different domains
// https://github.com/pyllyukko/user.js/issues/227
// https://github.com/pyllyukko/user.js/issues/328
// https://feeding.cloud.geek.nz/posts/tweaking-referrer-for-privacy-in-firefox/
// https://wiki.mozilla.org/Privacy/Privacy_Task_Force/firefox_about_config_privacy_tweeks
// NOTICE: Blocking referers across same eTLD sites breaks some login flows relying on them, consider lowering this pref to 1
user_pref("network.http.referer.XOriginPolicy", 2);
// PREF: Trim HTTP referer headers to only send the scheme, host, and port
// https://wiki.mozilla.org/Privacy/Privacy_Task_Force/firefox_about_config_privacy_tweeks
user_pref("network.http.referer.trimmingPolicy", 2);
// PREF: When sending Referer across domains, only send scheme, host, and port in the Referer header
// https://wiki.mozilla.org/Privacy/Privacy_Task_Force/firefox_about_config_privacy_tweeks
user_pref("network.http.referer.XOriginTrimmingPolicy", 2);
// PREF: Accept Only 1st Party Cookies
// http://kb.mozillazine.org/Network.cookie.cookieBehavior#1
// NOTICE: Blocking 3rd-party cookies breaks a number of payment gateways
// CIS 2.5.1
user_pref("network.cookie.cookieBehavior", 1);
// PREF: Enable first-party isolation
// https://bugzilla.mozilla.org/show_bug.cgi?id=1299996
// https://bugzilla.mozilla.org/show_bug.cgi?id=1260931
// https://wiki.mozilla.org/Security/FirstPartyIsolation
// NOTICE: First-party isolation breaks Microsoft Teams
// NOTICE: First-party isolation causes HTTP basic auth to ask for credentials for every new tab (see #425)
user_pref("privacy.firstparty.isolate", true);
// PREF: Make sure that third-party cookies (if enabled) never persist beyond the session.
// https://feeding.cloud.geek.nz/posts/tweaking-cookies-for-privacy-in-firefox/
// http://kb.mozillazine.org/Network.cookie.thirdparty.sessionOnly
// https://developer.mozilla.org/en-US/docs/Cookies_Preferences_in_Mozilla#network.cookie.thirdparty.sessionOnly
user_pref("network.cookie.thirdparty.sessionOnly", true);
// PREF: Spoof User-agent (disabled)
//user_pref("general.useragent.override", "Mozilla/5.0 (Windows NT 6.1; rv:45.0) Gecko/20100101 Firefox/45.0");
//user_pref("general.appname.override", "Netscape");
//user_pref("general.appversion.override", "5.0 (Windows)");
//user_pref("general.platform.override", "Win32");
//user_pref("general.oscpu.override", "Windows NT 6.1");
/*******************************************************************************
* SECTION: Caching *
******************************************************************************/
// PREF: Permanently enable private browsing mode
// https://support.mozilla.org/en-US/kb/Private-Browsing
// https://wiki.mozilla.org/PrivateBrowsing
// NOTICE: You can not view or inspect cookies when in private browsing: https://bugzilla.mozilla.org/show_bug.cgi?id=823941
// NOTICE: When Javascript is enabled, Websites can detect use of Private Browsing mode
// NOTICE: Private browsing breaks Kerberos authentication
// NOTICE: Disables "Containers" functionality (see below)
// NOTICE: "Always use private browsing mode" (browser.privatebrowsing.autostart) disables the possibility to use password manager: https://support.mozilla.org/en-US/kb/usernames-and-passwords-are-not-saved#w_private-browsing
user_pref("browser.privatebrowsing.autostart", true);
// PREF: Do not download URLs for the offline cache
// http://kb.mozillazine.org/Browser.cache.offline.enable
user_pref("browser.cache.offline.enable", false);
// PREF: Clear history when Firefox closes
// https://support.mozilla.org/en-US/kb/Clear%20Recent%20History#w_how-do-i-make-firefox-clear-my-history-automatically
// NOTICE: Installing user.js will remove your browsing history, caches and local storage.
// NOTICE: Installing user.js **will remove your saved passwords** (https://github.com/pyllyukko/user.js/issues/27)
// NOTICE: Clearing open windows on Firefox exit causes 2 windows to open when Firefox starts https://bugzilla.mozilla.org/show_bug.cgi?id=1334945
user_pref("privacy.sanitize.sanitizeOnShutdown", true);
user_pref("privacy.clearOnShutdown.cache", true);
user_pref("privacy.clearOnShutdown.cookies", true);
user_pref("privacy.clearOnShutdown.downloads", true);
user_pref("privacy.clearOnShutdown.formdata", true);
user_pref("privacy.clearOnShutdown.history", true);
user_pref("privacy.clearOnShutdown.offlineApps", true);
user_pref("privacy.clearOnShutdown.sessions", true);
user_pref("privacy.clearOnShutdown.openWindows", true);
// PREF: Set time range to "Everything" as default in "Clear Recent History"
user_pref("privacy.sanitize.timeSpan", 0);
// PREF: Clear everything but "Site Preferences" in "Clear Recent History"
user_pref("privacy.cpd.offlineApps", true);
user_pref("privacy.cpd.cache", true);
user_pref("privacy.cpd.cookies", true);
user_pref("privacy.cpd.downloads", true);
user_pref("privacy.cpd.formdata", true);
user_pref("privacy.cpd.history", true);
user_pref("privacy.cpd.sessions", true);
// PREF: Don't remember browsing history
user_pref("places.history.enabled", false);
// PREF: Don't remember recently closed tabs
user_pref("browser.sessionstore.max_tabs_undo", 0);
// PREF: Disable disk cache
// http://kb.mozillazine.org/Browser.cache.disk.enable
user_pref("browser.cache.disk.enable", false);
// PREF: Disable memory cache (disabled)
// http://kb.mozillazine.org/Browser.cache.memory.enable
//user_pref("browser.cache.memory.enable", false);
// PREF: Disable Caching of SSL Pages
// CIS Version 1.2.0 October 21st, 2011 2.5.8
// http://kb.mozillazine.org/Browser.cache.disk_cache_ssl
user_pref("browser.cache.disk_cache_ssl", false);
// PREF: Disable download history
// CIS Version 1.2.0 October 21st, 2011 2.5.5
user_pref("browser.download.manager.retention", 0);
// PREF: Disable password manager (use an external password manager!)
// CIS Version 1.2.0 October 21st, 2011 2.5.2
user_pref("signon.rememberSignons", false);
// PREF: Disable form autofill, don't save information entered in web page forms and the Search Bar
user_pref("browser.formfill.enable", false);
// PREF: Cookies expires at the end of the session (when the browser closes)
// http://kb.mozillazine.org/Network.cookie.lifetimePolicy#2
user_pref("network.cookie.lifetimePolicy", 2);
// PREF: Require manual intervention to autofill known username/passwords sign-in forms
// http://kb.mozillazine.org/Signon.autofillForms
// https://www.torproject.org/projects/torbrowser/design/#identifier-linkability
user_pref("signon.autofillForms", false);
// PREF: Disable formless login capture
// https://bugzilla.mozilla.org/show_bug.cgi?id=1166947
user_pref("signon.formlessCapture.enabled", false);
// PREF: When username/password autofill is enabled, still disable it on non-HTTPS sites
// https://hg.mozilla.org/integration/mozilla-inbound/rev/f0d146fe7317
user_pref("signon.autofillForms.http", false);
// PREF: Show in-content login form warning UI for insecure login fields
// https://hg.mozilla.org/integration/mozilla-inbound/rev/f0d146fe7317
user_pref("security.insecure_field_warning.contextual.enabled", true);
// PREF: Disable the password manager for pages with autocomplete=off (disabled)
// https://bugzilla.mozilla.org/show_bug.cgi?id=956906
// OWASP ASVS V9.1
// Does not prevent any kind of auto-completion (see browser.formfill.enable, signon.autofillForms)
//user_pref("signon.storeWhenAutocompleteOff", false);
// PREF: Delete Search and Form History
// CIS Version 1.2.0 October 21st, 2011 2.5.6
user_pref("browser.formfill.expire_days", 0);
// PREF: Clear SSL Form Session Data
// http://kb.mozillazine.org/Browser.sessionstore.privacy_level#2
// Store extra session data for unencrypted (non-HTTPS) sites only.
// CIS Version 1.2.0 October 21st, 2011 2.5.7
// NOTE: CIS says 1, we use 2
user_pref("browser.sessionstore.privacy_level", 2);
// PREF: Delete temporary files on exit
// https://bugzilla.mozilla.org/show_bug.cgi?id=238789
user_pref("browser.helperApps.deleteTempFileOnExit", true);
// PREF: Do not create screenshots of visited pages (relates to the "new tab page" feature)
// https://support.mozilla.org/en-US/questions/973320
// https://developer.mozilla.org/en-US/docs/Mozilla/Preferences/Preference_reference/browser.pagethumbnails.capturing_disabled
user_pref("browser.pagethumbnails.capturing_disabled", true);
// PREF: Don't fetch and permanently store favicons for Windows .URL shortcuts created by drag and drop
// NOTICE: .URL shortcut files will be created with a generic icon
// Favicons are stored as .ico files in $profile_dir\shortcutCache
user_pref("browser.shell.shortcutFavicons", false);
// PREF: Disable bookmarks backups (default: 15)
// http://kb.mozillazine.org/Browser.bookmarks.max_backups
user_pref("browser.bookmarks.max_backups", 0);
// PREF: Export bookmarks to HTML automatically when closing Firefox (disabled)
// https://support.mozilla.org/en-US/questions/1176242
//user_pref("browser.bookmarks.autoExportHTML", true);
//user_pref("browser.bookmarks.file", '/path/to/bookmarks-export.html');
// PREF: Disable downloading of favicons in response to favicon fingerprinting techniques
// https://github.com/jonasstrehle/supercookie
// http://kb.mozillazine.org/Browser.chrome.site_icons
// https://blog.mozilla.org/security/2021/01/26/supercookie-protections/
user_pref("browser.chrome.site_icons", false);
/*******************************************************************************
* SECTION: UI related *
*******************************************************************************/
// PREF: Enable insecure password warnings (login forms in non-HTTPS pages)
// https://blog.mozilla.org/tanvi/2016/01/28/no-more-passwords-over-http-please/
// https://bugzilla.mozilla.org/show_bug.cgi?id=1319119
// https://bugzilla.mozilla.org/show_bug.cgi?id=1217156
user_pref("security.insecure_password.ui.enabled", true);
// PREF: Disable right-click menu manipulation via JavaScript (disabled)
//user_pref("dom.event.contextmenu.enabled", false);
// PREF: Disable "Are you sure you want to leave this page?" popups on page close
// https://support.mozilla.org/en-US/questions/1043508
// NOTICE: disabling "beforeunload" events may lead to losing data entered in web forms
// Does not prevent JS leaks of the page close event.
// https://developer.mozilla.org/en-US/docs/Web/Events/beforeunload
//user_pref("dom.disable_beforeunload", true);
// PREF: Disable Downloading on Desktop
// CIS 2.3.2
user_pref("browser.download.folderList", 2);
// PREF: Always ask the user where to download
// https://developer.mozilla.org/en/Download_Manager_preferences (obsolete)
user_pref("browser.download.useDownloadDir", false);
// PREF: Disable the "new tab page" feature and show a blank tab instead
// https://wiki.mozilla.org/Privacy/Reviews/New_Tab
// https://support.mozilla.org/en-US/kb/new-tab-page-show-hide-and-customize-top-sites#w_how-do-i-turn-the-new-tab-page-off
user_pref("browser.newtabpage.enabled", false);
user_pref("browser.newtab.url", "about:blank");
// PREF: Disable Snippets
// https://wiki.mozilla.org/Firefox/Projects/Firefox_Start/Snippet_Service
// https://support.mozilla.org/en-US/kb/snippets-firefox-faq
user_pref("browser.newtabpage.activity-stream.feeds.snippets", false);
// PREF: Disable Activity Stream
// https://wiki.mozilla.org/Firefox/Activity_Stream
user_pref("browser.newtabpage.activity-stream.enabled", false);
// PREF: Disable new tab tile ads & preload
// http://www.thewindowsclub.com/disable-remove-ad-tiles-from-firefox
// http://forums.mozillazine.org/viewtopic.php?p=13876331#p13876331
// https://wiki.mozilla.org/Tiles/Technical_Documentation#Ping
// https://gecko.readthedocs.org/en/latest/browser/browser/DirectoryLinksProvider.html#browser-newtabpage-directory-source
// https://gecko.readthedocs.org/en/latest/browser/browser/DirectoryLinksProvider.html#browser-newtabpage-directory-ping
// TODO: deprecated? not in DXR, some dead links
user_pref("browser.newtabpage.enhanced", false);
user_pref("browser.newtab.preload", false);
user_pref("browser.newtabpage.directory.ping", "");