Where are my bookmarks?

[spacemanspiffy]

Take a look at this thread. It should answer your question.

Missing bookmarks after Update from Purebrowser to Firefox ESR

Do you still have your purebrowser files/installation somewhere on the device? Generally speaking (though i do not own a librem laptop myself yet) when switching from one browser to another you can always export your bookmarks from one browser into a file, and then from your new browser select to import bookmarks - select the file and voila. If however the update completely overwrote and deleted the previous browser and associated files,it may be recoverable by methods someone far more savvy th…