How Do I Backup and Restore My Mozilla Profile Without Losing Data? or Is There a Way to Sync My Mozi

Corrupted mozilla profile? Classic. Here’s my checklist:
1. Run Firefox in Safe Mode (hold Shift while opening).
2. Clear the startup cache (google how—it’s easy).
3. If all else fails, `refresh Firefox` but *export your bookmarks first*.

Also, sync your stuff to a Mozilla account. Saved me more times than I can count.