three clicks i'd never heard out til today(i just got irritated by the lack of functionality and do my form filling in chrome)

I'm on a mac and everything else spell checks just fine, so:

1. Why not Firefox?

2. Why do I have to jump through some undocumented hoops to get something that should work out of the box?

I'm guessing they meant "No spellcheck in forms without jumping through more hoops."

Right. When I looked into how to get spell checking in form fields all the advice I could find on the Internet was "install a plugin".

It seems to me that spell checking of form fields should be a basic feature integrated into the browser.