Set version to 3.0beta4.  Marked compat w ff 33.0a1
v3.0beta4.  translations: "Disabled sites", by non-native speaker.

Note that help text in Disabled sites dialog is not internationalized.
Fixed gfycat.com links esp. when hovering text link

It seemed to work before when hovering eg a gfycat.com thumb
on reddit.com, but not when hovering the link's text.  That's now
fixed, by allowing OthersIndirect to parse a json result doc.