I like the Aero peek previews, but when programs abuse them it becomes really difficult to see what you're doing.
I really like Firefox 4 so far. It's fast, looks nice and it's all about the little things that make it better. Except when I hovered over the task item and saw ...
Now you're probably thinking... what's the big deal, right? Well each browser window will add more previews, and with my insane super-nerd 5x browser with 20x tabs in each browsing habits, that'll equate to a lot of previews.
Luckily, there's a nice little option to disable it (unlike Chromium).
Click on the Firefox button in the top left corner and select "Options".
Select "Show tab previews in the Windows taskbar".
That's it, you're done!