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

[Thane K. Sherrington]

Hi André,

     I've seen this happen before as well.  It can be a pain to find the 
-XXXXXX suffix entries in the registry.
     I think it happens if you have a two copies of different languages 
installed.  I've seen it with Firefox English-US and English-UK, for 
instance.
     I've been trying to uninstall/reinstall rather than upgrade, but 
the uninstall doesn't always remove both.  Haven't debugged it yet.

Thane K. Sherrington

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On 06/08/2020 10:23 a.m., André Sänger wrote:
> Hello Mike,
>
> if I understood it correctly, the FirefoxHTML-E7CF176E110C11B and 
> FirefoxURL-E7CF176E110C11B nomenclature should only appear if the 
> installer didn´t update a previous version that was already using the 
> FirefoxHTML / FirefoxURL values. At least that´s the case on my own 
> machine where FirefoxESR 68.11.0 is still using the old key without 
> the "-E7CF176E110C11B" suffix.
>
> So I suspect at some point during an update that check didn´t work as 
> expected on a couple of machines, but I can´t pinpoint and reproduce 
> the exact circumstances yet, which would be helpful for a proper 
> installer bug report.
>
> Right now I´m just looking for a proper fix for the affected machines, 
> perhaps someone on the mailing list already had the same problem and 
> can give advice?
>
>
>
> Am 05.08.2020 um 23:35 schrieb 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 
>> <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 
>> <mailto: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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>
> -- 
> André Sänger
> Informations- und Kommunikationstechnik
>
> Landratsamt Coburg – Lauterer Straße 60 – 96450 Coburg
> Telefon 09561 514-1205 – Telefax 09561 514-891205
>
> andre.saenger at landkreis-coburg.de
> www.landkreis-coburg.de
>
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