Haha, thanks for reading, I was just polling some random thoughts out of my mind without deep thinking, so the content may be a bit off-topic. Despite this, I think the solution of your problem has been mentioned, it the “New associated tab” I imagine to be implemented in future browser. In your case, when you want to search the size info, you just hit a shortcut to create an tab associated with the current e-commerce site you are viewing. The two tabs are related because you told the browser they are, not by data analyzing which could be very unreliable and inaccurate. Since the original post is merely a concept prototyping, I assume we can imagine the solutions freely :p