Created attachment 8569113 [details] Screenshot_2015-02-25_13-03-07.png User Agent: Mozilla/5.0 (X11; Linux x86_64; rv:35.0) Gecko/20100101 Firefox/35.0 Build ID: 20150126171358 Steps to reproduce: Open firefox after a force close with Restore Session tab. Create some new tabs with keyboard shortcuts. Open open some links on new tabs (with <a herf> on new tab). Switch tabs. Close some tabs with keyboard shortcuts until there is no reaction. Open new firefox instance with "/usr/lib/firefox/firefox %u" command. Actual results: Current tab close in the tab bar but still remain open on the viewer side as in the screenshot. Cannot close the mistery tab with keyboard shortcuts. Cannot switch tab with mouse and kb shortcuts. Cannot create new tab with mouse and kb shortcuts. URL bar freezed on the mistery tab with URL when trying to close tab. Can close tabs in tab bar with mouse. Can create a new window with kb shortcuts. On this new window everything seems to be okay. New oppened firefox instance with "/usr/lib/firefox/firefox %u" command open the mistery tab correctly once, then it opens firefox home page. Does not affect the mistery tab on previous firefox instance. Expected results: Properly close the mistery tab and switch to an other opened tab.
Actual results complement : Add-ons and "Inspect Element" entry on the right-click menu does not seem to retrive the URL and does not react when trying to use them.