Examine source code of Colorpick Eyedropper

{
  "manifest_version": 2,
  "description": "__MSG_extDescription__",
  "name": "__MSG_extName__",
  "browser_action": {
    "default_icon": {
      "16": "img/icons/no-shadow/icon16.png",
      "19": "img/icons/no-shadow/icon19.png",
      "32": "img/icons/no-shadow/icon32.png",
      "38": "img/icons/no-shadow/icon38.png",
      "48": "img/icons/no-shadow/icon48.png"
    },
    "default_title": "__MSG_extName__",
    "default_popup": "popup.html"
  },
  "content_scripts": [
    {
      "js": [
        "Cr.js",
        "options_prefs.js",
        "colorpick.user.js"
      ],
      "run_at": "document_start",
      "matches": [
        "<all_urls>"
      ]
    },
    {
      "js": [
        "installkey.user.js"
      ],
      "matches": [
        "http://vidsbee.com/OrderComplete.php*",
        "https://vidsbee.com/OrderComplete.php*"
      ],
      "run_at": "document_idle"
    },
    {
      "js": [
        "color-input.user.js"
      ],
      "matches": [
        "<all_urls>"
      ],
      "all_frames": true,
      "run_at": "document_idle"
    }
  ],
  "background": {
    "scripts": [
      "options_prefs.js",
      "options_prefs_helpers.js",
      "background.js"
    ],
    "persistent": false
  },
  "options_page": "options.html",
  "icons": {
    "16": "img/icon16.png",
    "32": "img/icon32.png",
    "48": "img/icon48.png",
    "64": "img/icon64.png",
    "128": "img/icon128.png"
  },
  "web_accessible_resources": [
    "img/icon16.png",
    "img/icon64.png",
    "img/icons/palette/icon32.png",
    "img/icons/history/icon32.png",
    "img/icons/search/icon32.png",
    "img/game/bunny.webp",
    "img/game/rabbit.webp",
    "img/crosshair.png",
    "img/close.png",
    "img/sponsors/colordoctor.jpg",
    "img/sponsors/waterpik.jpg",
    "img/sponsors/picks.jpg",
    "img/sponsors/laser.jpg",
    "img/sponsors/color.jpg",
    "img/sponsors/prismacolor.jpg",
    "img/sponsors/bulb.jpg",
    "img/sponsors/purple.jpg"
  ],
  "permissions": [
    "activeTab",
    "tabs",
    "<all_urls>",
    "storage",
    "alarms"
  ],
  "browser_specific_settings": {
    "gecko": {
      "id": "jid1-kCS67LPIOiGf2Q@jetpack"
    }
  },
  "content_security_policy": "script-src 'self'; object-src 'self'",
  "default_locale": "en",
  "version": "0.0.2.39"
}