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Deleted Bookmarks from 5 years ago suddenly all restored
I'm totally desperate: all the bookmarks (which I deleted about 5 years ago) have been restored since I started to use my old laptop again, which I hadn't used in years - what can I do? I'm talking about hundreds of bookmarks which would take me days to check and delete - this was already an issue years ago but didn't occur for quite some time, but today it has reappeared. Please help to fix this right now, and also for this issue to not occur again - there has to be an option to define one computer as the main one with which all other secondary computers should be synced, and not the other way around...?
Alla svar (1)
On a desktop device, Firefox keeps backups in the bookmarkbackups folder, so you can restore an earlier backup that doesn't have those bookmark.
The name of automatically created JSON bookmarks backups in the bookmarkbackups folder includes a total item count (folders and separators included) and an hash value to prevent saving the same backup more than once. You also see this count in the Library Restore menu drop-down list.
- bookmarks-YYYY-MM-DD_<item count>_<hash>.jsonlz4.
Best would probably be to disconnect this old device beforehand and remove all (old) bookmarks and other outdated data on this device if you want to use Sync with it. Or you can create a new profile on this device and connect it to Sync to transfer your current data to this device.
See "Creating a profile":