> Task: checkIntegrity
+ The places.sqlite database is sane
+ The favicons.sqlite database is sane
> Task: checkCoherence
+ The database is coherent
> Task: expire
+ Database cleaned up

If you had complete data loss -- no custom settings, none of your add-ons, no saved logins, etc. -- check the following article about checking for other profiles: [[Recover user data missing after Firefox update]]. ''If the issue is only bookmarks:'' First thing to try is simply exiting out of Firefox and starting it up again. Some users have clean-up programs that check browser data files, so if one of those is running slowly, there may be a delay before Firefox can access its files. Check for an extra toolbar with the error message in the title of the following article: [[Fix "The bookmarks and history system will not be functional" error message]]. If you see that bar, Firefox either can't get access to the file -- possibly another process has locked it -- or the file has become corrupted. Before giving up on the file and nuking it (as described in that article), you could try a few other things: '''(1) Try to release the file if it's locked''' I found a post describing how to use Windows' Resource Monitor to try to figure out what program has opened a "handle" on the file (filter by ''places''): https://superuser.com/a/643312 If it won't release, try a normal shutdown and/or restart of your system. If you use CCleaner or Advanced SystemCare, and they normally run at startup, see whether you can cancel that or create an exception for Firefox files. '''(2) Run the "Verify Integrity" diagnosis and repair function''' That's here: Open Firefox's Troubleshooting Information page using any of these methods: * "3-bar" menu button > Help > More Troubleshooting Information * (menu bar) Help > More Troubleshooting Information * type or paste '''about:support''' in the address bar and press Enter Near the bottom, there is a section titled '''Places Database''' -- that's the file which stores history and bookmarks. Click the button labeled '''Verify Integrity'''. There may be a 10-15 second delay before results appear. If all is well, the report that appears below the button should start with: > Task: checkIntegrity + The places.sqlite database is sane + The favicons.sqlite database is sane > Task: checkCoherence + The database is coherent > Task: expire + Database cleaned up ''et cetera'' Does yours say the databases are sane and coherent, or something else? You can select and copy the report, and then paste it into a reply for review and comment.