Try to open about:support page and click the Verify integrity button in the Places database section. It should produce a log, you can paste it here for an analysis.

> Task: checkIntegrity - Unable to check places.sqlite integrity: Error: Error(s) encountered during statement execution: > Task: checkCoherence - The task queue was cleared by an error in another task. > Task: expire - The task queue was cleared by an error in another task. > Task: vacuum - The task queue was cleared by an error in another task. > Task: stats - The task queue was cleared by an error in another task. > Task: _refreshUI - The task queue was cleared by an error in another task.

That definitely sounds frustrating. When bookmarks feel “locked” like that, it’s often related to a corrupted profile or permission issue rather than the browser itself. You might want to try creating a new Firefox profile and see if bookmarks work there. I’ve run into similar setup headaches before and started keeping notes and fixes in Phonexa, which made troubleshooting a lot less painful over time. Hope that points you in the right direction.

I uninstalled and then reinstalled it, but I’m still having the same issues. I logged out of my profile, and it works at first, but then the problems come back. I can’t even export my bookmarks...