Thanks for the screenshot, UlfZibis. In consultation with one of the Ubuntu bug team members, it appears that you are using a Thunderbird add-on called "Thunderbrowse"
The Thunderbrowse website is here: https://addons.mozilla.org/en-US/firefox/addon/thunderbrowse/ Unfortunately, it appears that the add-on is no longer maintained and was last updated for Thunderbird version 16, back in 2012. As an alternative, the current version of Firefox will allow you to keep specific tabs open all the time. I use this feature constantly. When I open Firefox, my regular 9 tabs come up automatically every time. Would you like me to show you how to do that? Hope this helps G -- You received this bug notification because you are a member of Desktop Packages, which is subscribed to thunderbird in Ubuntu. https://bugs.launchpad.net/bugs/1332944 Title: Update not working correctly Status in thunderbird package in Ubuntu: Incomplete Bug description: -> Ubuntu 14.04 64-bit <- After regular update from Thunderbird 24.5.0 to 24,6.0 I had following issues: - No proper localisation i.e., I had to manually activate the language from addons manager and restart. - All open tabs were lost. Before processing the update, my Thunderbird was propperly closed. *** I see this problem since 2 years, but not on any update *** To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/thunderbird/+bug/1332944/+subscriptions -- Mailing list: https://launchpad.net/~desktop-packages Post to : desktop-packages@lists.launchpad.net Unsubscribe : https://launchpad.net/~desktop-packages More help : https://help.launchpad.net/ListHelp