userChromeJS / autoconfig.js and extensions
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chrome Update defaultExtPrefs.jsm Feb 1, 2018
extensions Add files via upload Sep 23, 2018
installation-folder Create config-prefs.js Nov 29, 2017
screenshots Add files via upload Nov 29, 2017
LICENSE Initial commit Oct 15, 2017 Update Nov 29, 2017


Tested on Firefox 58.0b7


  1. Save config.js to Firefox installation folder (usually C:\Program Files (x86)\Mozilla Firefox), next to firefox.exe.

  2. Save config-prefs.js to \defaults\pref inside Firefox installation folder (usually C:\Program Files (x86)\Mozilla Firefox\defaults\pref), next to channel-prefs.js.

  3. Create chrome folder inside your Firefox profile. To open profile folder, visit the page about:support in Firefox, then click Open Folder.

  4. Create utils folder inside chrome, then save all these files to it.

  5. Save userChrome.js to chrome.

  6. Save the desired userChromeJS scripts to chrome folder, especially rebuild_userChrome.uc.js (userChromeJS Manager with Greasemonkey-like button menu, picture below).

  7. Restart Firefox.


userChromeJS Manager (the blue ones are restartless)

Status Bar, Extension Options Menu, MinMaxClose Button, newDownloadPlus.uc.js and legacy extensions: