Firefox sync gets stuck on Windows sometimes, especially after updates or permission changes. You might see "Sync is not working" messages or get logged out repeatedly. The good news? It’s usually fixable without wiping your account.
Here’s what to do next.
1. Check your Firefox sync settings
First, make sure you’re signed in with the correct account. Go to Menu > Settings > Sync and check if "Sync is turned on" appears under your account name.
If not, toggle it off and back on again.
2. Clear Firefox’s sync cache
Sometimes the sync cache gets corrupted. To clear it:
- Open a new tab and type
about:config - Search for
sync - Find
services.sync.tokenand double-click to reset it - Restart Firefox
This resets the sync token without affecting your data.
3. Check for conflicting extensions or add-ons
Some extensions interfere with sync, especially privacy-focused ones like uBlock Origin or cookie blockers.
Disable all extensions temporarily to see if that fixes it. If so, re-enable one by one to find the culprit.
Final thoughts
You can often fix Firefox sync on Windows without a full reset—just clean up settings and cache first.
If none of these steps work, consider checking your network or trying a fresh profile as a last step.