Firefox is dead. You need an insurmountable amount of configuration to even make it bearable and there is non-user respecting settings and telemetry everywhere. Ads, too. It's not something you can recommend, every site is broken and Mozilla rather likes to spend it's money on [1] discouraging human translators and [2] giving people free coffee on "Browser Raves" in Berlin instead. It's a shadow of its former self.
If a site is broken, it's likely due to blocking of trackers. In the URL bar, click on the shield icon and disable the slider "Enhanced Tracking Protection". But yeah, that can be annoying.
Google is an advertising company. I don't understand choosing to use their browser if you can avoid it.
[1] https://support.mozilla.org/en-US/forums/contributors/717446
[2] https://www.instagram.com/p/DPn_Re5AAkN/