Hello there.

Why exactly did you expect the dictionary to somehow show up in the toolbar? This is not a rhetorical question.

In any case, and answering yours [question], you can configure which dictionary is being used in Firefox's inbuilt spell checker by right clicking a text field and selecting the appropriate option. It's easy but, unfortunately, it's a browser-wide choice, so if you need to use more than one dictionary, you may have to keep changing it through the right click menu. If you use just one, it's very simple, and once it's configured, you shouldn't have to use it again.

Any other question, feel free to ask.

See also:

• How do I use the Firefox spell checker?
• http://kb.mozillazine.org/Dictionaries
• http://kb.mozillazine.org/Spell_checking