I'm a long time Firefox user but unfortunately Firefox has bad issues with performance/battery usage on MacOS. Multiple long standing issues are open. (such as https://bugzilla.mozilla.org/show_bug.cgi?id=1404042 - open for 2 years)
I love Firefox but I had no choice and had to ditch it on MacOS.
It seems Mozilla does not have the resources to fix these problems.
Firefox has performance and general software bloat issues on all plattforms. They sacrificed their original "tailor the browser exactly to your needs" approach on the altar of keeping up with Chrome on features.
I love Firefox but I had no choice and had to ditch it on MacOS. It seems Mozilla does not have the resources to fix these problems.