Detect current tab

[CosmicToast]

[Feature Request]
Detect if current tab is a twitch.tv tab, and if so, load the new url in place of the current tab.
The justification is that few people will watch two streams at the same time (generally they use a special site to do so). In my use case, when I'm watching a stream and one of my favorites come on, I want to switch to the stream, rather than open a new tab.
I'm not sure how technically doable that is in js though (I don't work with javascript). If you guys use priorities, I'd definitely qualify this as [Low Priority].