RequestPolicy is a Firefox extension that gives you control over cross-site requests. --- Be sure to look at the dev-1.0 branch as that's where all of the interesting work is happening. See also: https://www.requestpolicy.com/1.0.html
When clicking on an external script url in the view source view, the request policy rules are applied and the normal page, not the view source page is displayed a "do you want to allow redirect to domain?" since the page is not visible at that moment, I got a bit confused why clicking on the link didn't work, mayb it would be possible to show the warning in the right window (or allow the request, since it is manually requested anyway)
When clicking on an external script url in the view source view, the request policy rules are applied and the normal page, not the view source page is displayed a "do you want to allow redirect to domain?" since the page is not visible at that moment, I got a bit confused why clicking on the link didn't work, mayb it would be possible to show the warning in the right window (or allow the request, since it is manually requested anyway)