[sillysaurusx]

FWIW, I'm sympathetic and I think your extension is fine.

But to play the pesky devil's advocate: you can make the extension consist entirely of a button on your Chrome bar, which you click on to see a popup containing the content that would normally be injected into the page itself. Thus, it wouldn't need any page permissions.

You can even show the number of tweets by displaying the number on the icon.