Disable About Something 1.1 Requires Restart
by ClearCode Inc.
Provides ability to disable "about:*" pages by the configuration.
About this Add-on
To block loading of an "about:*" page, you just have to define a new boolean preference "extensions.disable-about-something@clear-code.com.about.*" with the value "false". For example if you want to block loading of "about:permissions", just set "extensions.disable-about-something@clear-code.com.about.permissions" to "false". Otherwise - with no value or "true", the page is never blocked.
There are similar addons for specific "about:*" pages. They disables related menu items and others for the page, so they are recommended for general cases.
* "about:addons" : Disable Addons https://addons.mozilla.org/addon/disable-addons/
* "about:accounts" and "about:sync-*" : Disable Sync https://addons.mozilla.org/addon/disable-sync/
* "about:config" : Disable about:config https://addons.mozilla.org/addon/disable-aboutconfig/
This addon is created mainly for enterprise users.