Examine source code of Thinking Abstract

{
  "theme": {
    "images": {
      "theme_frame": "mozillaaa.png"
    },
    "colors": {
      "frame": "#bababa",
      "tab_background_text": "#ffffff"
    }
  },
  "version": "2.0",
  "name": "Thinking Abstract",
  "manifest_version": 2,
  "description": "hehe. this is my firstt theme, i made everything myself, and i had a lootttt of fun making itt (:"
}