PageMod attaching worker to same URL multiple times

Question

CLEAN SOLUTION FOUND

I found a very clean solution which really renders this whole question pointless, and I am certain it existed when I asked this

Answer 1

In the contentScript or whatever is running in the web site (i dont know much about sdk), check if (window.frameElement == true) if its true than its a frame then you want to cancel the attach.

edit: maybe window.frameElement wont work from within the frame. if it doesnt work do this if (window.top != window) then its a frame