Examine source code of Glo Web Clipper

{
  "manifest_version": 2,
  "name": "Glo Web Clipper",
  "description": "A web clipper for GitKraken Glo boards.",
  "version": "1.0.2",
  "author": "Jasper van Merle",
  "homepage_url": "https://github.com/jmerle/glo-web-clipper",
  "permissions": [
    "storage",
    "tabs",
    "<all_urls>"
  ],
  "icons": {
    "16": "icons/icon-16.png",
    "19": "icons/icon-19.png",
    "20": "icons/icon-20.png",
    "24": "icons/icon-24.png",
    "32": "icons/icon-32.png",
    "38": "icons/icon-38.png",
    "48": "icons/icon-48.png",
    "64": "icons/icon-64.png",
    "96": "icons/icon-96.png",
    "128": "icons/icon-128.png"
  },
  "content_scripts": [
    {
      "matches": [
        "<all_urls>"
      ],
      "css": [
        "css/content.css"
      ],
      "js": [
        "js/browser-polyfill.min.js",
        "js/content.js"
      ]
    }
  ],
  "background": {
    "scripts": [
      "js/browser-polyfill.min.js",
      "js/background.js"
    ]
  },
  "browser_action": {
    "default_icon": {
      "16": "icons/icon-16.png",
      "19": "icons/icon-19.png",
      "20": "icons/icon-20.png",
      "24": "icons/icon-24.png",
      "32": "icons/icon-32.png",
      "38": "icons/icon-38.png",
      "48": "icons/icon-48.png",
      "64": "icons/icon-64.png",
      "96": "icons/icon-96.png"
    },
    "default_title": "Clip to Glo",
    "browser_style": false
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{abc76e94-79e2-4dfe-9bc1-be0335eb2d26}"
    }
  }
}