Weird. I have Firefox with quite a few extensions and probably about 50 tabs open (most are dormant, but still), and it's not showing as an energy hog.
Unless I'm using video conf or other very heavy websites, CPU usage tends to sit between 2 and 5% with an occasional spike.
12 hr Power in activity manager shows 19.50 (Watts, I presume) which is by far the largest in the list but it's also more or less the only app I've used in those hours :D . Activity Monitor itself usually has an energy impact of ~30.
Unless I'm using video conf or other very heavy websites, CPU usage tends to sit between 2 and 5% with an occasional spike.
12 hr Power in activity manager shows 19.50 (Watts, I presume) which is by far the largest in the list but it's also more or less the only app I've used in those hours :D . Activity Monitor itself usually has an energy impact of ~30.