Skip to content


Subversion checkout URL

You can clone with
Download ZIP
How we lock down Firefox
JavaScript CSS HTML Makefile
Latest commit 4b5f722 @kaihendry kaihendry Merge pull request #67 from Webconverger/fix_social_console_error
Add init function to avoid console error

Webconverger addon for Firefox

Curated by Mike Kaply @mikekaply

The common idea is to limit the Firefox browser to functions for kiosk style (non-personal) browsing. Limit most Firefox features to convey simplicity, familiarity and principle of least astonishment.

Used in "Enterprise" deployments, schools, libraries, signs, shops and banks! shows how it is used in the Webconverger Linux distribution.


Found a way to circumvent the extension? Please let us know!

Many thanks to security researcher and "kiosk hacker" Paul Craig for his review.

Mozilla addons listing

Testing on Archlinux

Copy preferences to /usr/lib/firefox/browser/defaults/preferences/webc.js.

Webconverger preferences

Basic Proxy authentication

When used together:

  • extensions.webconverger.proxyusername
  • extensions.webconverger.proxypassword

Neon bg.png when network lost

Ensure the symlink is present:

/etc/webc/extensions/neon/content/bg.png -> /home/webc/bg.png

Debug tips

Add to your /usr/lib/firefox/browser/defaults/preferences/webc.js:

pref("browser.dom.window.dump.enabled", true);

Then in your JS, use dump() to print to stderr after running firefox upon a terminal.


The annoying Choose What I Share dialog is disabled in

Something went wrong with that request. Please try again.