Blogger Or Firefox Doesn't Give Obama No Respect

I have been using the Firefox Internet browser sometimes when I write my blog post on Blogger.
For some reason, when I write the name "Obama" it comes up as a misspelled word.  I wonder why the spell check has not accepted Obama's name yet?  Same with "Obama's" It doesn't happen every time, but, if I were Obama, I would be pissed if it happened one time.