Backup File not being Created

Could you please check if there's anything similar in Browser Console (under "More Tools" in menu) as posted in bugzilla.mozilla.org/2062094 — if it's perhaps the same error you get? Thanks.

I’ve compared my situation to the one you’ve reference. There are similarities and differences: Differences: • My PC: Win 11 Pro (theirs Win 10) • My FF ver 154.0 theirs FF 153.0 • My Browser Console message – was this “warning” [fluent-dom] An element named "icon" wasn't found in the source. • Their Browser Console message: BackupService: Could not create C:\Users\USERNAME\Documents\Restore Firefox\desktop.ini: NotAllowedError: Could not write to `C:\Users\USERNAME\Documents\Restore Firefox\desktop.ini': failed to open file for writing (NS_ERROR_FILE_ACCESS_DENIED) BackupService.sys.mjs:4116:23

Similarities: • My browser.backup.backup-debug-info message: {"lastBackupAttempt":1787153673,"errorCode":9,"lastRunStep":13} • Their browser.backup.backup-debug-info message: {"lastBackupAttempt":1786243812,"errorCode":9,"lastRunStep":13}

I tried following this user suggestion: Could you try deleting the desktop.ini at C:\Users\USERNAME\Documents\Restore Firefox\desktop.ini and then do a backup? But I do not have any \Restore Firefox folder in my C:\Users\Username\Documents folder

OK the "fluent" log is trivial text warning, not related — so you do not see any BackupService errors logged when you try to run the backup?

(As for deleting files, it would be in your D:/Restore Firefox in your exact case.)

Ok let me recheck a couple items

OK… I turned off the Backup, then opened the Console and cleared all messages found under all the tabs (Errors/Warnings/Info/Logs/Debug) . No messages were found. Then turned on the backup and saw a momentary “Backup in Progress” that was quickly replaced with the “Hmmm, there was a problem backing up” message.

I cycled through all the console tabs but there were no messages shown. A new D;\Restore Firefox folder was created, but it was empty (no files). The browser.backup.backup-debug-info message was {"lastBackupAttempt":1787764036,"errorCode":9,"lastRunStep":13}

It seems the reporter on the bug above also doesn't seem to have any desktop.ini in there, so there might be something in common.

With the absence of console errors I can unfortunately only recommend following the bug timeline, in case the root cause is the same — or feel free to comment on the bug you're facing the same with just no logs in case an engineer had some diagnostic steps to collect some data from your system.

FF updated to Ver 155.0 so I attempted the backup process again – the results are the same: • My D:\Restore\Firefox folder was created but it was empty (no Desktop.ini file) • The browser.backup.backup-debug-info message was: {"lastBackupAttempt":1788462675,"errorCode":9,"lastRunStep":13} • Then I turned the Backup OFF, opened the browser console, cleared all messages, and then turned on the Backup. These were the console messages received: (Red Circle !) uncaught exception: Object { message } 2 (Red Circle !) BackupUIParent: Failed to retrigger backup DOMException: PathUtils.join: Could not append to path: NS_ERROR_FILE_UNRECOGNIZED_PATH

   finalizeSingleFileArchive resource:///modules/backup/BackupService.sys.mjs:2073

BackupUIParent.sys.mjs:107:23 (Yellow Triangle !) Empty string passed to getElementById(). 11 index.html

That is a very good log, thank you! Would you mind posting that to the bugzilla report linked earlier, so that you're part of the conversation there, to help uncover the culprit? Thanks.

YW and TY for your help moving this issue along... I just posted my last results to the bugzilla link above. I hope it helps.