Examine source code of Bluey Dog

{
  "name": "Bluey",
  "manifest_version": 2,
  "version": "1.0",
  "theme": {
    "images": {
      "theme_frame": "Bluey.jpg"
    },
    "colors": {
      "frame": "rgba(39, 85, 194, 1)",
      "tab_background_text": "rgba(0, 0, 0, 1)",
      "toolbar": "rgba(150, 215, 255, 1)",
      "tab_line": "rgba(95, 176, 201, 1)"
    }
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{2c85ea5e-dd99-4d0d-b9ce-30025b6687ee}"
    }
  }
}