Spell Check Anywhere makes every application in Windows become spell check enabled. This includes spell check in Firefox Internet Browser. Click on the link below.
Spell Check Anywhere adds robust, accurate spell checking that finds the correct spelling for the heaviest misspelled words. It also comes with a build in reference dictionary. If you are not sure which is the right spelling you are looking for, select the word, and click the “Dictionary” button. This will bring up a concise definition for you to help you allow you to decide which is the word you wanted.