Examine source code of FPlus

{
  "manifest_version": 2,
  "name": "FPlus",
  "description": "This extension enables the user to use new functions of Fogis",
  "version": "1.4.3",
  "icons": {
    "16": "icon_16.png",
    "32": "icon_32.png",
    "48": "icon_48.png",
    "128": "icon_128.png"
  },
  "options_ui": {
    "page": "options.html"
  },
  "browser_action": {
    "default_icon": "icon_128.png",
    "default_popup": "popup.html"
  },
  "content_security_policy": "script-src 'self'; object-src 'self'",
  "content_scripts": [
    {
      "js": [
        "thirdParty/jquery-3.3.1.min.js",
        "scripts/content_script.js",
        "scripts/ref.js",
        "scripts/coach.js"
      ],
      "matches": [
        "https://fogis.svenskfotboll.se/*",
        "http://fogis.svenskfotboll.se/*"
      ]
    }
  ],
  "background": {
    "scripts": [
      "background.js"
    ],
    "persistent": true
  },
  "permissions": [
    "tabs",
    "activeTab",
    "storage",
    "webRequest"
  ],
  "web_accessible_resources": [
    "fplus.css",
    "cal.svg",
    "options.html"
  ],
  "applications": {
    "gecko": {
      "id": "fplus@jenshendar.com",
      "strict_min_version": "48.0"
    }
  }
}