Examine source code of FireFox Mozilla

{
  "theme": {
    "images": {
      "theme_frame": "Header_Stickercopy.jpg"
    },
    "colors": {
      "frame": "#6fc9d9",
      "tab_background_text": "#696868"
    }
  },
  "version": "2.0",
  "name": "FireFox Mozilla",
  "manifest_version": 2,
  "description": "I hope you like this!"
}