small enhancement idea

[technological]

First Off this is my most favorite plug-in in the whole world for
firefox. I don't know how I would do my job without it. So thankyou
thankyou thankyou. Now with that out of the way.

I often find it a need to compare the differences of say one div from
another or one td from another. It would be super cool if you could
select a <div> with the inspect like normal and then click like a
compare button, that would allow the two to be compared side by side
with some highlighting of the differences.