If this applies to you go and visit , it's a free download that loads into the tools button on the tool-bar and checks what you write in these little boxes.
If everyone knew about this already except me, please accept this apology! I've been using it a couple of months now and think it's great.
I THOUGHT IT MIGHT BE HELPFUL to add to my post above this message from Sussexguy that you can read further down the thread, so that all the salient information was in one place:
I use Spellbound with firefox same kinda thing I think.