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Re:Mozilla TowTruck – real-time collaboration on any site by Tautologistics on Sunday April 14, 2013 @11:04AM (#5547049)
Here's a bookmarklet:

  javascript:(function () { var script = document.createElement('script'); script.onload = function () { TowTruck(); }; script.src = 'https://towtruck.mozillalabs.com/towtruck.js'; document.getElementsByTagName('body')[0].appendChild(script); })();
Re:Mozilla TowTruck – real-time collaboration on any site by ianb on Sunday April 14, 2013 @01:32PM (#5547478)
There's also an Addon (https://github.com/mozilla/towtruck/wiki/Addon) which is basically equivalent to a bookmarklet like this where you activate the bookmarklet every time you load a new page. It's only intended to trying TowTruck out (like the bookmarklet).