Firefox

Remove redundant coroutine dispatchers in our tests: https://searchfox.org/mozilla-mobile/search?q=maincoroutinerule%5C%28%5B%5E%29%5D&path=&case=false&regexp=true

mozilla-mobile/android-components#10605 is already removing these in AC.

fd = new FormData
fd.set('a', new Blob)
fd.get('a') === fd.get('a') // false in chromium - true in FF & Safari (don't have IE on Mac)

Looks like there is no test to cover this senario: https://github.com/web-platform-tests/wpt/blob/e45a9f9e65d039c76817ee2a6a1ef02c9311a1cb/xhr/formdata/set-blob.any.js

I think fd.get('a') === fd.get('a') should be true

Some OS have dark and light variants of their themes. For instance GNOME have an extension that switches automatically the themes depending on the time or the luminosity.

Other Firefox extensions like darkreader can automatically detects the system theme, and adapt acc