KallOut has been re-written from the ground up to runs as a stand-alone Firefox add-on. This is the first cross-platform version of KallOut. We support the Mac, Linux and PC version of Firefox and only require a 26KB download to run. Here is what one user said:
"I have 70+ Firefox extensions, all chosen and kept with greatest care, so I'm very cautious as to adding any new one. But KallOut has to be included, because it is well thought, very handy, functional, unobtrusive. Bravo and thanks for a great product."
We are working on an API that will allow anyone to customize the menu and developers to write their own KallOuts. If you're interested, follow @KallOut on Twitter and sign up on the developer page.