[tor-bugs] #30565 [Applications/Tor Browser]: roll back to previous version of TBB - saved logins and tabs lost after tor browser bundle upgrade (8.5)

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#30565: roll back to previous version of TBB - saved logins and tabs lost after tor
browser bundle upgrade (8.5)
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 Reporter:  rollback-question                    |          Owner:  tbb-
                                                 |  team
     Type:  defect                               |         Status:
                                                 |  needs_information
 Priority:  Very High                            |      Milestone:
Component:  Applications/Tor Browser             |        Version:
 Severity:  Normal                               |     Resolution:
 Keywords:  tbb-8.5-issues, tbb-regression,      |  Actual Points:
  TorBrowserTeam201905, user-feedback, blog      |
Parent ID:                                       |         Points:
 Reviewer:                                       |        Sponsor:
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Comment (by rollback-question):

 thanks for your help mcs and sorry for not answering earlier. there was no
 Browser/TorBrowser/UpdateInfo/updates/last-update.log and i tried moving
 away the directories Browser/TorBrowser/UpdateInfo and
 Browser/TorBrowser/Data/Browser/profile.default/startupCache and launched
 the (broken) tor browser with the --log option, output attached. as you
 can see the log file doesn't contain any useful information and that is
 why i didn't post here until now, i was wondering if there is a way to
 increase the logging level before coming back with empty hands..

 but today everything changed, the working TBB got updated and i had again
 hope that it could force the broken one to update again, this time
 successfully. but it didn't, i got the same "about" window with the button
 to restart but without changing anything when pressed. but then i renamed
 again the directories Browser/TorBrowser/UpdateInfo and
 Browser/TorBrowser/Data/Browser/profile.default/startupCache and launched
 the tor browser and there it was, downloading a 77MB file. btw clicking on
 the tor icon and selecting "Check for Tor Browser Update" did nothing. but
 after it finished the download the broken TBB restarted and everything is
 back to normal now, with the exception of the lost tabs that were never
 recovered. but it's functional, new tabs are now restored, there is no
 longer an icon to restart the browser in the "about" window, it shows now
 it's running version 8.5.1 (based on Mozilla Firefox 60.7.0esr) (64-bit)
 and everything looks good now! btw it was also running with the --log
 argument when the upgrade was successful but the log file is as useless as
 the one i just posted

 thanks again mcs, gk, acat and everyone else for the help, and please let
 me know if i should post anything else (logs, etc) now that it is fixed.
 and also thanks for resolving the problem with the saved passwords (i see
 it in the change notice of the new build) and your great work that makes
 the tor browser possible! i can't thank you enough. but if you ever attend
 the CCC congress in germany (i know some tor developers do) please
 bring/put a donations box with you like other groups do (FSF, EFF, etc). i
 miss every year the opportunity to make an anonymous donation in cash to
 the project

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Ticket URL: <https://trac.torproject.org/projects/tor/ticket/30565#comment:27>
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