When you're opening a link in a new tab, this extension will identify if you already have a tab opened with the URL that was clicked (exact match only for now) and will switch to it if that's the case.
This is unpublished yet. To use it:
$ git clone git@github.com:ematsumiya/click2switch.git
In Firefox, go to about:debugging and then click Load Temporary Add-on. Navigate to where you cloned this repo and open the file "manifest.json".
Select Enable add-on debugging to debug/devel.
The extension will stay loaded until you reset the browser.
See TODO.