[Mozilla Enterprise] Can´t open links in Outlook - caused by stale FirefoxESR registry keys, fix?

[Mike Kaply]

If you think this is definitely a Firefox bug, could you open a bug in
bugzilla?

I honestly don't know.

https://bugzilla.mozilla.org/enter_bug.cgi?product=Firefox&component=Installer

Mike

On Wed, Aug 5, 2020 at 4:41 AM André Sänger <
andre.saenger at landkreis-coburg.de> wrote:

> Hello,
>
> some of our Users (Windows 10) reported errors when trying to open links
> in Outlook messages (“Your organization’s policies are preventing us
> from completing this action for you. For more info, please contact your
> help desk”.). I have tracked down the problem to incorrect FirefoxESR
> Registry keys.
>
> In these cases I noticed [HKEY_CLASSES_ROOT\.html] still points to
> @="FirefoxHTML", which in turn contains no
> HKR\FirefoxHTML\shell\open\command.
>
> HKR\FirefoxHTML-E7CF176E110C11B does exist as well and contains correct
> shell\open\command entries but doesn´t get used since HKR\.html still
> points to HKR\FirefoxHTML.
>
> Already tried reinstalling firefox, changing the standard app selection
> via Windows 10 system settings, executing
> [Firefoxpath]\uninstall\helper.exe" /SetAsDefaultAppGlobal command, all
> without success.
>
> As a quick workaround copying the shell\open\command from the
> FirefoxHTML-E7CF176E110C11B entry to the FirefoxHTML one does work, but
> that´s not a proper fix.
>
> Is there a tool/script, that can clean up the old stale FirefoxHTML /
> FirefoxURL entries automatically? It´s not just
> [HKEY_CLASSES_ROOT\.html], there are lots of entries all over the place
> still pointing to the old nomenclature.
>
>
> --
> Regards,
> André
>
>
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