If you have issues with spelling, or you just want to make sure you don't have any, Firefox is likely the best browser ever because of its built-in spell checker. I'm not afraid to admit that I have a few spelling issues. Ok, I'm a little afraid because I actually make a living writing things for people. But, no matter how bad your issues with spelling are, no one ever has to know if you have the right tools on your side.
With a combination of Word and Firefox, none of my misspellings ever see the light of day. No one would ever find out how often I misspell things because I use both all of the time without fail. Well, thy might find out if I spilled it on my blog or something. Oops.
Anyway, one of the things that I do regularly is to go through my Firefox dictionary additions to make sure that I haven't accidentally added misspellings to it. Surprisingly, this is a common occurrence that many people are guilty of. I discovered one recently because I usually cross-check anything I've written by checking it in both Firefox and Word. That ensures that if Word is being weird, Firefox will catch it. And if something was added to Firefox by accident, Word will catch it. Here's a detailed explanation of how to do this. It's pretty simple to do, and if you use Firefox, you might be surprised at what you find.