It would be very nice to have a quick "Go to" feature in what comes to open tabs.
Currently we navigate through CTRL+Tab, right? "Go to next", "Go to previous".
What if you have a cluttered browser with so many tabs you have to go find them? What if the whole list doesn't fit the screen?
I suggest that CTRL+Tab be complemented with a popup that lets you choose what tab you want and go to it directly.
If the user simply presses CTRL+Tab (+Shift or not) then it moves to the next one (or the previous, whichever the case). But if the user does not release the keys, the popup stays on and lists the open tab, allowing to click on the item and move to it instantly.
Much like Notepad++ does. Try opening a bunch of files in Notepad++ and using CTRL+Tab to see what I mean.
Another cool feature that could be added was a shortcut number - something like CTRL+Tab and then a number key (1...9).
Of course, this could be optional, since the basic user wouldn't be needing this, probably.