That is the same way the Goooooooooooogle toolbar is - except it has its search box to the left, a pop up blocker and pretty fancy (open box spell checker) too and a few other features I never use - but if it is a field where you enter text (any email program etc.., you can spell check it.
I'm pretty good at remembering to use it, I've had a few complaints and grown self conscious about my spelling - somehow some people got the impression the site Admin. guy should have A+ spelling ability, yeah right - lol
I guess a neat feature is the ADD TO DICTIONARY FEATURE - where I add member names as they come along, including beekeeping terms not found in the speller in the beginning. So eventually you tweak it to your personal likes.
Often, I use a program called Ultra-Hal Text to Speech reader, which does just that, takes ANY copied text from anywhere and reads it to me in several voice that I choose from - this is ideal for long posts in the forum or for lengthy webpages, news articles, etc. Over the years I have tweaked hundreds of pronunciations and it has gotten extremely good at reading to me with this mistakes that need fixing.