Current session files are not removed as I want to prompt before doing so. This will be fixed by Firefox bug 907129 which unfortunately won't be fixed until Firefox 29.
Because of this change, closed tabs aren't restored when combining windows into one window at browser startup. _firstTabs was removed from SessionStore in Firefox 26.Fixed 'Save' keyboard shortcut would save window if shift key used in shortcut.Fixed issues where Session Manager toolbar buttons could be added in the wrong spot in Firefox 28 and up.Fixed issue with Session Manager causing top of window to grow in size in Firefox 28 and up.Fixed error that occurred when 'resume_session' preference was empty.Fix bug in 0.8.0.9 which caused session name to not appear in title bar in Firefox 27 and lower.
