Extension for Chrome that redirects you to an existing tab if you try and open the same url [closed]
Solution 1:
EDIT Previously linked extension doesn't work. Only One, however appears to work flawlessly.
This should do the trick for you, though the logic is a bit differet in that it closes the OLD tab and opens the NEW tab. Same effect in the end though.
Solution 2:
Fast Unique Tab is what you're looking for.
The other extensions mentioned here are vastly outdated and some simply don't work.