Sobre este extra
Usage: see screenshots.
Also you can create private bookmarks to always open some links in private tabs: just prefix “private:” before URL, example: private:https://addons.mozilla.org/
In English: http://forums.mozillazine.org/viewtopic.php?t=2665169
In Russian: http://forum.mozilla-russia.org/viewtopic.php?id=58122
Source code and issues tracker: https://github.com/Infocatcher/Private_Tab
Please read about known issues before reporting bugs:
Some styles for userChrome.css/Stylish to change private tabs appearance:
Works only in Gecko 20.0 and higher (Firefox 20.0+ and SeaMonkey 2.17+) because used API doesn't exist in older versions!
See https://bugzilla.mozilla.org/show_bug.cgi?id=800193 for information about “Warning: Only internal code is allowed to set the usePrivateBrowsing attribute” in the Error Console.
[x] Don't toggle private state of not yet initialized tabs in Firefox 51+ to not break tab's contents: wait for loading and forbid too often toggle state calls (#237).
[x] Correctly remove wrappers for functions from another extensions like `window.TabScope._updateTitle()` in Firefox 45+ (now sandboxed, will used trick to get actual `window` object to store internal data).
[x] Correctly toggle private state with disabled multi-process mode in Firefox 51+ (#237, #241).
[x] Correctly toggle private state of pinned tabs in Firefox 51+ (now pinned state will be restored) (#237).