I don't have Xmarks or FoxTab installed, but I do have TabMixPlus installed. Is there a conflict between that and Tab Groups, and if so, is there a feature in Tab Mix Plus I can take down without sacrificing the whole thing?

App (pinned) tabs and Tab Groups (Panorama) are stored as part of the session data [1] in the file sessionstore.js [2] in the Firefox profile folder [3].

Make sure that you do not use "Clear Recent History" to clear the "Browsing History" when Firefox is closed because that prevails and prevents Firefox from opening tabs from the previous session.

• https://support.mozilla.com/kb/Clear+Recent+History

• [1] http://kb.mozillazine.org/Session_Restore
• [2] http://kb.mozillazine.org/sessionstore.js
• [3] http://kb.mozillazine.org/Profile_folder_-_Firefox Firefox

It is also possible to use the "Show my windows and tabs from last time" setting, that is usually a more reliable way to restore session data.

• Firefox/Tools > Options > General > Startup: "When Firefox Starts": "Show my windows and tabs from last time"

Thanks. Got it, there is a sessionstore-1.js file in my profile folder... But how can I restore it? I guess one of these damn plugins changed my sessionstore.js files because sessionstore-1.js is 608 kb and sessionstore.js is 178 kb... Even when I open sessionstore-1.js my saved sites are in there so the question is: How can I restore sessionstore-1.js I tried renaming but it didn't work :(

You see such sessionstore-1.js with a number if Firefox wasn't able the rename that file sessionstore.js as the last step in creating a new file.

You can make a backup copy of sessionstore-1.js elsewhere and rename the file to sessionstore.js to replace that file.
That should make Firefox recover that session provided that the file is not corrupted.

See this mozillaZine thread if you need to extract links from a corrupted file.

• http://forums.mozillazine.org/viewtopic.php?f=38&t=622036&start=45

Thank God I restored all my tabs... and thank you too @cor-el In case of any problems with "session restore" I summarize it: 1- Go to help -> troubleshooting information 2-click open "containing folder" 3-*[IMPORTANT]* CLOSE FIREFOX NOW 4-cut sessionstore-1.js(or any other number following) and paste it to desktop 5-rename sessionstore-1.js in desktop to sessionstore.js 6-*[IMPORTANT]* DELETE sessionstore.bak 7-move sessionstore.js which is in desktop and place it in the "containing folder " 8-choose move and replace (in win7) 9-start Firefox and have fun with your restored session!

email: Pooya_moradi@yahoo.com