Notes about the TUE file extension:
Incorrect file associations could be the result of underlying issues within your PC system. As such it is highly recommended to scan your PC for invalid registry entries, unused processes and other unfavourable system settings to identify slowdown issues.
The TUE file type is primarily associated with 'Firefox'. Produced by a Firefox extension that creates a bookmark backup file each time you close the Firefox browser. If your bookmark file is called BOOKMARK.HTML then the backup will be BOOKMARK.HTML.TUE on a Tuesday.