If you wish to build your extension, not only for Firefox but also for Chrome, IE & Safari with only 1 (javascript) code, I would suggest you to use Crossrider .
My answer to Is it possible to know the target DOMWindow for an HTTPRequest will almost get you there. You get the window associated with the request but it might be a frame in the tab. Once you have it you can get window.
Top - this will be the top window in the browser tab. If you need the actual browser tab element, you can use my answer in Finding the tab associated with a DOM window for that.
I cant really gove you an answer,but what I can give you is a way to a solution, that is you have to find the anglde that you relate to or peaks your interest. A good paper is one that people get drawn into because it reaches them ln some way.As for me WW11 to me, I think of the holocaust and the effect it had on the survivors, their families and those who stood by and did nothing until it was too late.