Question about Firefox Energy Use

So I was just on a Google Meets call with about 12 other people. Most of whom had their cameras on.

My 2019 MBP 16" got super hot pretty much instantly and the fans kicked on. This is common for every video call I do.

I checked the "Energy Impact" score in Activity Monitor and it said 56. Nothing else running had an impact score higher than 1. I know that if I don't plug the power cord in, as soon as I do a call the battery drops by 1-2% a minute.

Someone on the call suggested that I switch to Safari, and when I did after 20 minutes (on the same call) the laptop was normal temperatures, battery had only dropped 2-3% total, and the energy impact said 1.7.

Now... 56 to 1.7 seems like a huge difference. I don't know quite what the numbers mean in Apple's "Energy Impact" but I do feel that Firefox turns my laptop into a toaster.

So questions:

Is this abnormal? Should I be worried about my MBP? It seems fine in all other regards.

Are there any settings I can change to improve Firefox?

Surely the Firefox team is aware of this sort of thing, yeah? Curious why it's hard to fix -- is it Google Meet or Apple that's making it harder for Firefox to work properly? Or is battery life just not something on the Firefox radar?