Firefox can automatically check the spelling of words that you enter in text boxes. As soon as you finish typing a word, it is checked against the words in the installed dictionary.
If your spell check is disabled follow these simple steps to enable in browsing spell check.
- In Firefox click the Menu button top right
- Now choose Options
- Make sure you are on the 'General' tab
- Tick 'Check my spelling as I type' tick box
- Close the Options window
That's it... Firefox will now check your spelling as you work.