Comment 5 for bug 1117543

Prefixing with X- is not a solution because these keys aren't read by Midori but by launchers and docks (Unity, Plank, Docky, AWN, GNOME Shell).

Turns out, the Desktop Entry spec as of 1.1 supports this under a different name. The new naming works in Plank, so I pushed a patch to use the new names. See http://git.xfce.org/apps/midori/commit/?id=9310cfeab34607cca1c93e5cb485bf87160b3233
We'll need to wait for Pantheon to be recognized by validation/ added to the spec. The X- won't be understood by application code.