I've moved your post to the Firefox for Enterprise forum, where you should be able to get some more targeted help.

I assume you're removing these old versions so you can get all users up to date on Firefox ESR 60?

That is correct. The systems that have it, we are asking if its really required, and if so, to get those under a standard version that I can manage.

Thank you for moving the question to the appropriate section. I was sorta successful in doing an forced uninstall using this powershell code:

Start-Process 'C:\Program Files\Mozilla Firefox\uninstall\helper.exe' -ArgumentList "/s" -Wait -ErrorAction SilentlyContinue Start-Process "C:\Program Files (x86)\Mozilla Firefox\uninstall\helper.exe" -ArgumentList "/s" -Wait -ErrorAction SilentlyContinue

$FirefoxInstallLocations = Get-ChildItem -Path 'C:\Users\*' -Include "Helper.exe" -Recurse -Force -ErrorAction SilentlyContinue

FOREACH($FireFoxInstallLocation in $FireFoxInstallLocations){ $SetupFile = $FireFoxInstallLocation.ToString() Start-Process -FilePath $SetupFile -ArgumentList "/s" -Wait -ErrorAction SilentlyContinue }

I'm not sure if that's the best way or not, but I just wanted to point you to

https://www.mozilla.org/firefox/organizations/

You can use Firefox 60ESR (I wouldn't suggest 52) with full support for group policies and deployments. I hope that helps!

I'd be interested in what it would take to get your organization to switch to Firefox entirely?