Resurrecting this ancient post to note that XKCD itself has transcripts directly on the page, in a display:none div.
$1 can fix that. No more hitting a different website for transcripts after visiting random XKCD links on Reddit. You'll need to have Stylish installed of course, but why don't you already have that? It's one of the most useful tools for blind/VI people on the web anyway, and is available for both Firefox and Chrome. So no excuse. LOL.