I find Facebook on the browser (Safari or Firefox on macOS) quite slow in many interactions. Even looking at the list of notifications takes a long time on a hi

I find Facebook on the browser (Safari or Firefox on macOS) quite slow in many interactions. Even looking at the list of notifications takes a long time on a high speed connection. I’ve concluded that Facebook doesn’t do much performance and responsiveness testing on browsers...which is not logical since this is the same company that tries to get people on 2G connections and slow 3G connections to use its platform. Another guess is that the development and testing targets mainly (or only) Google Chrome, which I don’t use. I’m not sure if long running browser sessions (without restarts) cause more issues. But the Facebook pages are heavy, and rendering is a lot slower than it used to be a few years ago.