Examine source code of Homestuck Hephaestus

{
  "theme": {
    "images": {
      "theme_frame": "Hephaestus.png"
    },
    "colors": {
      "frame": "#ff0000",
      "tab_background_text": "#000000"
    }
  },
  "version": "2.0",
  "name": "Homestuck Hephaestus",
  "manifest_version": 2,
  "description": "Theme of Dave Strider's browser from the amazing MSPA Homestuck. I realize that the picture is supposed to be on the left, and that was my original design, but it was denied because images have to be on the left >_<"
}