Symptoms
- Extension icon missing from the toolbar
- Extension listed but shows as disabled
- Extension settings reset to default
- Browser shows a warning about the extension
Likely causes
- CommonBrowser update disabled incompatible extensionsMajor browser updates sometimes automatically disable extensions until they're verified compatible.
- CommonExtension removed from the web store by the developer or platformIf an extension violates policy or is abandoned, it can be pulled entirely.
- CommonExtension hidden from the toolbar, not actually removedToolbar icon visibility is a separate setting from whether the extension is installed.
- PossibleSync conflict across devicesIf you use a different profile or device, extensions don't automatically carry over.
- Less commonExtension disabled by the browser for security concernsSome extensions get flagged and disabled after being identified as malicious.
What to do
- Click the puzzle piece or extensions icon in the toolbar to see if it's just hidden and needs pinning.
- Go to the browser's extensions management page and check if it's listed but disabled, then re-enable it.
- Search the web store to see if the extension is still available; reinstall if needed.
- Check if the extension was flagged for a security or policy issue, in which case find an alternative.
- Make sure sync is enabled if you expect extensions to carry across your devices.
- Restart the browser after making any changes.
When to call a pro
If an extension was removed for security reasons, don't try to reinstall it from an unofficial source.
Safety
Generally low risk
Generally low risk for a careful person. Stop if anything looks different from what this guide describes.