Examine source code of SvD Free

{
  "manifest_version": 2,
  "name": "SvD Free",
  "version": "0.25resigned1",
  "description": "Unlimited number of free articles on svd.se.",
  "homepage_url": "https://github.com/crash007/svd-free",
  "author": "crash007",
  "icons": {
    "48": "icon128.png",
    "128": "icon128.png"
  },
  "browser_action": {
    "default_icon": {
      "32": "icon128.png"
    }
  },
  "background": {
    "scripts": [
      "libs/jquery-3.2.1.min.js",
      "background.js"
    ]
  },
  "permissions": [
    "cookies",
    "*://*.svd.se/*"
  ],
  "browser_specific_settings": {
    "gecko": {
      "id": "{c954d8b5-72e6-4068-b797-bd53ac9666d0}"
    }
  }
}