You can disable JIT in Chrome (which also enables CET [1], just like in Edge) by executing it with

  --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...