Examine source code of Colors Boat

{
  "manifest_version": 2,
  "name": "Colors Boat",
  "version": "1.1",
  "description": "Explore beautiful colors !",
  "icons": {
    "512": "logo.png"
  },
  "content_scripts": [
    {
      "matches": [
        "*://*.mozilla.org/*"
      ],
      "js": [
        "app.js"
      ]
    }
  ],
  "browser_specific_settings": {
    "gecko": {
      "id": "{92fbd7d8-7e22-4534-9ae1-ae9686ad5d5a}"
    }
  }
}