Fire Fox has a built in Spell check. You can spell check Spanish words by doing the following:
- Right Click in the Text Box. A menu should appear.
- At the bottom of the menu Firefox will say “check spelling”. Highlight “languages” and click on “add dictionary”.
- You can now select several dictionaries, including Spanish.
When you are typing in English, you want to make sure the “English Dictionary” is the one currently checked under “Languages”. When you are typing in “Spanish” you want to make sure the “Spanish Dictionary” is checked under languages.