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.
[1] https://support.mozilla.org/en-US/forums/contributors/717446
[2] https://www.instagram.com/p/DPn_Re5AAkN/