[Request] Allow user to adjust popup width/height

[ganego]

First of all, thank you for your addon.
It's great (and quite scary) to see how much JS gets executed on some sites.

May I request adding an option to set width/height of the popup from when you click the addon button? With lots of observed events, I get a scrollbar, but there is enough space on my screen left.
In case the three-column layout is fixed and it would be too much work to change, at least a height option would be nice.

Thank you