How do I make Firefox use the built in Mac OS X spell checker?
I want to use the built in Mac OS X spell checker in Firefox, instead of the one that Firefox ships with. I have a lot of words I've told it to learn and in general, it's just more accurate (today, Firefox's spellchecker said that "immersive" wasn't a word, even though Mac OS X's spellchecker confirms that it actually is).
I've tried going to Preferences -> Advanced and unchecking "Check my spelling as I type", but that doesn't make Firefox default to the Mac OS X spellchecker. I tried Right-Clicking in the text field and choosing Languages -> Add Dictionaries…, but that doesn't let me add the Mac OS X spellchecker as a dictionary.
Is there any way at all that I can make Firefox use the superior spellchecker built into Mac OS X?
That addon specifically says in its description "It uses Firefox's inbuilt dictionary to check the spellings."
Firefox is already using its inbuilt dictionary. I want it to use the one built into Mac OS X!