Examine source code of Rainbow Rainbow

{
  "theme": {
    "images": {
      "theme_frame": "firefoxtest.png"
    },
    "colors": {
      "frame": "#66fff2",
      "tab_background_text": "#ffffff"
    }
  },
  "version": "2.0",
  "name": "Rainbow Rainbow",
  "manifest_version": 2,
  "description": "Made this to accommodate with my Profile Theme in Sheezyart. :3\nXD Since I'm probably not the only one who likes rainbows,I thought I'd share this with you all. C:"
}