GMail compose on Firefox on Mac cmd+leftarrow cmd+rightarrow I am using GMail and I cannot move to Firefox from Chrome, because the Cmd+← and Cmd+→ do not work in Compose window as "Move to the beginning of the line" and "Move to the end of the line", respectively.

How can I fix that?

(Mountain Lion 10.8.3, Firefox 20.0)
I accidentally found a nice solution for this. I just started using textbox.io for Firefox and the Cmd+← and Cmd+→ work like a charm.