Words you wouldn't expect to be in a spell checker

I was typing an email a few minutes ago, and used the word 'automagically'. Much to my surprise, in Chrome and Safari, the spellchecker didn't fire, but the one in Firefox did.

I guess Firefox is for spelling conservatives and Chrome/Safari are on the other side of the aisle. You'd think that there would be some kind of standard for a single shared spell-checking resource on a person's computer.