I have been using Firefox for several years now. Energy management is still an unsolved problem on MacOS (Firefox 71 on 10.14.6). They have been making improvements in the last several releases, but "Avg Energy Impact" remains around 40 for me (when browsing web pages, higher when streaming video).
I also noticed how different colors are between Chrome and Firefox. That becomes more obvious in the dark mode.
I also noticed how different colors are between Chrome and Firefox. That becomes more obvious in the dark mode.
https://bugs.chromium.org/p/chromium/issues/detail?id=44872