Ever wanted to get spell checking working on FireFox but don't know how to do it?

Fret no more!

It's really simple but not obvious to get working.
All you have to do is click on a text entry box on any website that has 2 lines of text entry or more and right click. In the menu that appears you will see "Add Dictionary", then add your language from the list that comes up and ok it.
Job done, you now have spell checking enabled!

My original post can be found here - http://techsupportteam.freeforums.org/spell-checker-on-firefox-t15.html