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

Mike

On Wed, Aug 5, 2020 at 4:41 AM André Sänger <[email protected] <mailto:[email protected]>> 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

[email protected]
www.landkreis-coburg.de

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