Firefox Recommended Browser Settings Clear Cache and Temporary Internet Files 1. Click Menu icon (three horizontal lines) on t
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old firefox data folder - bookmark backups will not open, file extension is not .pdf | Firefox Support Forum | Mozilla Support
![firefox refresh placed a folder [ old fx data ] on my desktop, attempt to restore failed - need help. | Firefox Support Forum | Mozilla Support firefox refresh placed a folder [ old fx data ] on my desktop, attempt to restore failed - need help. | Firefox Support Forum | Mozilla Support](https://user-media-prod-cdn.itsre-sumo.mozilla.net/uploads/images/2019-12-19-17-58-02-f159fc.png)