Can I safely delete an 8-month-old "Old Firefox Data" file folder on my desktop? | Firefox Support Forum | Mozilla Support
![old firefox data folder - bookmark backups will not open, file extension is not .pdf | Firefox Support Forum | Mozilla Support old firefox data folder - bookmark backups will not open, file extension is not .pdf | Firefox Support Forum | Mozilla Support](https://user-media-prod-cdn.itsre-sumo.mozilla.net/uploads/images/2020-05-28-09-38-53-903f4b.png)
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)