[xp84]

Since you have access to the URL fragment in JS, you should be able to do any of that manually even if there isn't a special API to use. The easiest thing to do would be to check for this specially-crafted fragment in the URL and store it.

I think though that this is a pretty niche feature though, so it's unlikely to be a big source of data. In my experience, the median sophistication web user has discovered that the browser's Back button exists and can Open in New Tab. Bookmarks, zoom, ctrl-F are all too confusing. A feature that requires right-clicking may as well be black magic to most people.