Do you use a variant of Firefox?
When you click a link in Outlook or OneNote, do you get this message?:
Your organization’s polices are preventing us from completing this action for you. For more information, please contact your help desk.
After upgrading to Waterfox, I kept on getting this annoying message.
Links in OneNote stopped working.
Unfortunately, online, Microsoft’s solution involves changing the registry in a way that partly made Internet Explorer the default browser.
Looking through the registry changes I figured out the proper fix.
In HKEY_LOCAL_MACHINE > Software > Classes, add in the following Key structure:
FirefoxHTML > shell > open > command
So in total, the Key structure will be:
HKEY_LOCAL_MACHINE > Software > Classes > FirefoxHTML > shell > open > command
No need to actually set any values inside. Don’t set the “Default” to anything.
There is a bug in Outlook and OneNote with regards to how it perceives opening files.
It looks for a match for exactly “FirefoxHTML”, while it should have looked for “FirefoxHTML*”.
Simply adding in the exact match to the registry, satisfies a check inside of Outlook and OneNote.
After the check is satisfied, it will match on “FirefoxHTML*”, and read the firefox directory, correctly opening the file.