I'd prefer that it display all text/* content in the browser. If I want to save it, then I'll save it.
text/*; firefox '%s'; test=test "$DISPLAY" != ""The preference pane does not let you create new lines -- the only way to add rules as a user is to encounter the Content-Type in the wild.
Awesome little gem: I went to Tools > Add-ons > Extensions > Find updates -- and it found and downloaded the new AMO version of my hacked local copy!