Comment 7 for bug 1860830

I can echo Eric's observation above but with Firefox 75 (released with 20.04) and Firefox 76 (latest version).

If geo.provider.network.url is set to the Google service then it doesn't work, but the mozilla one does. If you download Firefox from mozilla then geolocation with Google works fine, so it must be an issue with the version provided by Canonical/Ubuntu.