Allows you to make the Inbox Collapsible and loads your choice of Google Calendar, Reader, Notebook, Groups, etc… plus Custom URLs and Google Gadgets seamlessly into the gmail interface. Works w/Google Apps Accounts and GMail Themes.
I installed the Integrated Gmail add-on, but every time I went to Gmail I got an error pop up 🙁
I guess I’ll just have to wait for more testing before it works on my combo on OSX and Firefox. If you get this to work, let me know how you like it.