You should contact its support.

As if I hadn't thought of that! But the developer no longer seems to be active, and since it is not a change he made, it must be either Firefox or MS. Please try to be helpful with things that me/myself/I can do to make it function again. Replace some SQLite module? Tweak some Registry setting? Look for another similar add-on? (did that - nada).

https://sneakypete81.github.io/updatescanner/

"Due to changes in Firefox, Update Scanner has been completely rewritten, and not all of the previous features are finished. If you’d like to help, see our Github https://github.com/sneakypete81/updatescanner#readme and Issues https://github.com/sneakypete81/updatescanner/issues pages.

Did you try to uninstall and reinstall the extension ?

You can check the Browser Console for messages for this extension.

• https://developer.mozilla.org/en-US/docs/Tools/Browser_Console

I did uninstall and reinstall the add-on, twice, but it did not correct the issue.

I am not a developer, just a user, so I don't have intimate knowledge of JS commands, etc.

Here is the skinny on this: when Firefox is set to Private Mode (i.e., never remember history) SQLite is unable to save data (something about indexed DB not possible). Allow remembering of history and the extension data is saved just fine.

Note support for indexedDB in PB mode is being worked on.

• https://bugzilla.mozilla.org/show_bug.cgi?id=idb-private-browsing
• https://bugzilla.mozilla.org/page.cgi?id=etiquette.html