Sounds useful but I had to turn it off almost immediately due to poor UX. Some suggestions:

- Let me toggle this on and off by clicking its icon (hijacking the double click on every site I visit is both intrusive and annoying);

- Better yet, don't inject any script until I activate it;

- Please, don't pollute my JS console with debug and other logs (find a way to turn it off in production version) :)

Don't get me wrong, I think you had a great idea with this extensions. You just needs to polish it up a little bit.