I recently had to use a low-spec computer (Celeron 6305, 4GB Ram, Windows 11), and Firefox just did not run well on it. I switched over to Edge and it loaded webpages much faster, and used much less RAM and CPU while doing it.
The problem was I also had to go into the setting and turn at least 10 different things off. Shopping assistants, copilot, sidebars, etc. The average user is not going to know or feel comfortable turning all of these "features" off, leaving them a browser constantly showing them adware and sending tons of data off to Microsoft.
TLDR: On low-end computers Edge runs great, but Microsoft has also injected it with a bunch of crap.
1: https://microsoftedge.github.io/edgevr/posts/Super-Duper-Sec...
--js-flags="--jitless"
You can also disable JIT in Firefox by setting javascript.options.baselinejit, javascript.options.ion and javascript.options.native_regexp to false in about:config, although you won't get CET.[1] https://github.com/chromium/chromium/blob/12c232c43ce7324d30...
Not that I trust Microsoft any more than Google, but I figured they were less inclined to violate my privacy in the name of advertisers and other third parties since that wasn't their main business.
Only lasted on Edge about 6 months before I abandoned it as it quickly ended up just as intrusive as Chrome, if not more so, while also being a far worse user experience.