If you visit http://www.uneddit.com, it requires you to add a bookmark to use it. Although, if you're like me, and you hate bookmarks, this is for you! All this does is add a simple button to the bottom right of any comment section of Reddit.

One little note is if Reddit is running in HTTPS (I think they made it default), you must click the little shield in the address bar, and click "load unsafe script." This is the best way to get around this as of now, as it is not a problem I can fix.