They have a Google Wave Add-on that stores your account information and allows you to set how often you want Firefox to check your inbox. When you have a Firefox window open a little Wave icon will show up in the lower right corner of the screen. If a new wave arrives in your inbox, a number will show up next to the Wave icon indicating the number of new waves in your inbox. Genius! Now I don’t have to have Google Wave minimized all day while I’m working on other things.

I recommend downloading the add-on. You’ll be happy you did.