Did you know that Firefox has a handy-dandy built-in spell checker? It's great for catching spelling mistakes when writing emails online or composing blog posts.
From the Firefox help:
"Firefox automatically checks the spelling of words that you enter in text boxes containing more than one line. As soon as you finish typing a word, it is checked against the words in the installed dictionary. If the word is not found in the dictionary, it will be underlined in red..."
If only Firefox's spell checker could be used on EVERYTHING...