So far, I've checked this on 64bit and 32bit Linux .. and got either-or marginal results on Windows.
Has anyone noticed this? .. Page loading hangs with pages that have Adsense or pages including embedded YouTube Videos via iFrame.
Same happens whether or not Unity integration is enabled or not - and regardless of whether or not the Ad-Blocker is on or off in Windows.
Results are the same regardless of Plugins/Extensions on or off.
Install/Uninstall doesn't help. The last update that I can see had something to do with adding Firefox to Android Devices or something such other.
I've gone to using open-source Chromium 'till I can figure this out.
Am I missing something here, or has Firefox changed something in the About:Config that I might need to change back?