Examine source code of GetLink

{
  "author": "Rafael Prenholato <rprenhol@gmail.com>",
  "description": "Simple Vimeo link capture from embeded pages.",
  "manifest_version": 2,
  "name": "GetLink",
  "homepage_url": "https://github.com/rprenhol/getlink",
  "version": "2.3",
  "icons": {
    "48": "icon/48.png",
    "92": "icon/92.png"
  },
  "permissions": [
    "tabs",
    "activeTab",
    "storage",
    "clipboardWrite"
  ],
  "web_accessible_resources": [
    "icon/*"
  ],
  "options_ui": {
    "page": "options.html"
  },
  "content_scripts": [
    {
      "matches": [
        "<all_urls>"
      ],
      "js": [
        "js/player.js",
        "getlink.js"
      ],
      "css": [
        "css/main.css"
      ]
    }
  ],
  "background": {
    "scripts": [
      "background.js"
    ]
  },
  "browser_action": {
    "default_popup": "popup.html",
    "default_icon": {
      "16": "icon/16.png",
      "32": "icon/32.png"
    }
  }
}