Mine says "Up to Date 15.0.0.189" which as you point out also is incorrect. A bug has been filed for this, but I can't tell whether the problem has been fully diagnosed and anyone is going to pick up the ball and run with it: [https://bugzilla.mozilla.org/show_bug.cgi?id=1084537 1084537 – Flash sometimes displayed as up to date whilst vulnerable, on Windows 7] ''While it's generally not helpful to add comments to bugs (unless you can help fix them), you can register on the Bugzilla site and "vote" for them to be fixed.'' See: [https://bugzilla.mozilla.org/page.cgi?id=voting.html Voting], [https://bugzilla.mozilla.org/page.cgi?id=etiquette.html Bugzilla Etiquette]. Edit: For some reason, this bug doesn't allow voting.

Thank you for opening the bug report ! I see some very interesting investigation and discussions going on already. This issue is not a show-stopper, but it's a great feature to have.