Examine source code of firefox cool blue

{
  "theme": {
    "images": {
      "theme_frame": "firefoxblue.PNG"
    },
    "colors": {
      "frame": "#1b8fbd",
      "tab_background_text": "#1b8fbd"
    }
  },
  "version": "2.0",
  "name": "firefox cool blue",
  "manifest_version": 2,
  "description": "firefox cool blue made by request hope you enjoy !"
}