Hello, I am unable to set firefox as the default browser despite multiple different attempts to do so using group policy. I have: - Set a registry command (targeted at 32/64 via a WMI query) to reset the opening command as shown below: HKEY_CURRENT_USER\Software\Classes\http\shell\open\command "C:\Program Files (x86)\Mozilla Firefox\firefox.exe" -osint -url "%1" - Set a powershell logon script to run (that does run): firefox.exe -silent -setDefaultBrowser Despite setting the above it seems the client computers browsers are not affected by the settings above. When the script runs or if I run the command above a UAC window pops up and requests that I accept the command (for the setDefaultBrowser) but even if I click yes as an administrator it does nothing. Since GPO in 2012 has changed perhaps there is something that I am missing? Do I need to somehow disable Windows Internet Explorer from achieving default browser status? Please do not reply if you will suggest that I use Internet Explorer Maintenance (since this function in GPO has been disabled since IE10) My DC is Server 2012, my client computers are Win7 32/64.