Installed Firefox 3.5 but Duplicate tab isn’t working?

<<important note: this is still working for versions after 3.5!!>> There are a few ways to get Duplicate Tab to work once you install Firefox 3.5… Easiest Method: get yourself a changed version of this file: duplicatetab-1.0.2.xpi. You can download my finished version right here right now: (Edit: If the link doesn’t work, try […]