Vlad It just seems like an obvious add on. In my mind, the link is associated with the tab. I should be able to copy it by right clicking on it. I know that Arc has this feature. I have opted not to install Chrome on my new laptop so I'm not sure if its a feature their either.
Overall, just seems like something that should be accessible. I know it's available in Safari's pseudo vertical tab view. So it's not very wide spread, but it is there. And it doesn't make me second guess my actions or get a micro frustration when I run into browsers that don't have it. 🙂