There are efforts, and there are things you can run, but I wouldn't personally recommend doing so. I am very paranoid about browser security, and I (frankly) do

There are efforts, and there are things you can run, but I wouldn't personally recommend doing so. I am very paranoid about browser security, and I (frankly) don't trust smaller browser projects that aren't highly vetted by lots of people. That's an entirely separate conversation. My opinion is that it ends up being simpler and safer at the end of the day to just wrap the entire Firefox application in an Emacs buffer and then intercept keypresses to that buffer. But you do lose out on a lot of stuff by doing that; I'd love to have tighter integration.