I switched back to Firefox recently as well— the containers plugin has me completely won over. It takes a while to get in the groove of it, but surfing the internet and not being logged into Google and Facebook everywhere is great and totally worth it.

(I recently also switched back to Windows 10 after a decade+ on Mac OS. I never got satisfactory performance from Firefox on Mac, so part of trying it again was hoping that the perf story on Windows was better, which indeed it is.)