I have “struggled” with performance issues due to tab management for years. On the switch to Quantum, I felt the loss of Session Manager in particular, and finally settled on OneTab. On my work machine (Windows), I make semi-regular profile backups, and every once in a while I archive the current backup. On the upgrade to FFX 70 in October 2019, I lost all OneTab entries. (I apparently was not alone.) I immediately archived the most recent profile backup. I have tried a couple of times since then to figure out how to retrieve the OneTab data from the profile archive, but have always failed. I tried again this week, and am still failing. I contacted the OneTab development team via their website, but they never responded. Their information at https://www.one-tab.com/firefoxRestore is outdated. In the archived profile, under browser-extension-data\[email protected] I find the file storage.js.migrated, which was created when the extensions changed their storage location to the IndexedDB. It is dated to March 25, 2019. I could retrieve entries from that file, but I would not recover the many tabs saved between March and October 2019. This week, I uninstalled Firefox, set the current Firefox profile aside by renaming it, extracted the October 2019 profile to make it the current profile, went offline, installed Firefox 69.0.2, started Firefox, and displayed the OneTab overview page. Unfortunately, it was empty, so I restored the current FFX version and profile. After more research, I very hopefully reviewed the instructions given at: https://support.mozilla.org/en-US/questions/1275126 I then performed them carefully using the folder from the archived profile, but on restarting Firefox, I got the same result, an empty OneTab overview page. The sqlite file from the archive under storage\default\moz-extension+++2ce1f1a7-d4cf-41cb-b92d-3d450b7812b4^userContextId=4294967295\ is dated October 8, 2019, but is only 56 kB. When I open it in an editor (like Notepad++), it does contain text snippets recognizable as references to many of the tabs I had stored. How can I recover the information from this profile archive? My desire to use OneTab faltered after this incident and their lack of support, but I have been putting off reducing the number of open tabs until I recover my lost tabs. I am also open to any suggestions what to use for tab management after I recover.