[CmdrKrool]

Nasty surprise for me: 'Remove the ability to not "Always show the tab bar"' https://bugzilla.mozilla.org/show_bug.cgi?id=855370

'browser.tabs.autoHide' config also removed, tab bar now always visible no matter what.

Add-on to restore old behaviour: https://addons.mozilla.org/en-us/firefox/addon/hide-tab-bar-... (There is an unnecessary gradient to the background of my navigation toolbar now though.)

Discussion threads of indignant catharsis: https://groups.google.com/forum/#!topic/mozilla.support.fire... http://forums.mozillazine.org/viewtopic.php?f=23&t=2687123

[mhaymo]

The keyword.URL setting (http://kb.mozillazine.org/Keyword.URL) was also removed, and of course addons have been made to re-enable it:

https://addons.mozilla.org/en-US/firefox/addon/keywordurl-ha...

https://addons.mozilla.org/en-US/firefox/addon/keyword-searc...

I didn't understand why they would disable this feature which I love so much, but reading the bug explained that it was to prevent malicious apps from being able to change the default search in a way that is not easily reverted by users (keyword.URL can only be changed through about:config). Makes sense to me, and fortunately we have add-ons which can restore this functionality :)