Examine source code of Healthy Internet Project

{
  "manifest_version": 2,
  "name": "__MSG_extension_title__",
  "version": "1.3",
  "default_locale": "en",
  "description": "__MSG_extension_description__",
  "permissions": [
    "activeTab",
    "notifications",
    "storage",
    "chrome://favicon/",
    "https://api.healthyinternetproject.org/"
  ],
  "content_security_policy": "script-src 'self'; object-src 'self'; img-src chrome://favicon;",
  "background": {
    "scripts": [
      "/js/jquery-3.4.1.min.js",
      "/js/common.js",
      "/js/background.js"
    ],
    "persistent": false
  },
  "icons": {
    "16": "/images/icon-16.png",
    "32": "/images/icon-32.png",
    "48": "/images/icon-48.png",
    "128": "/images/icon-128.png"
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "support@healthyinternetproject.org"
    }
  },
  "browser_action": {
    "default_icon": "/images/icon-16.png",
    "default_popup": "html/flagging.html"
  },
  "web_accessible_resources": [
    "/images/icon-48.png",
    "/fonts/Inter-Regular.otf",
    "/fonts/Inter-Bold.otf",
    "/html/mentor-review.html"
  ],
  "short_name": "hip",
  "content_scripts": [
    {
      "matches": [
        "<all_urls>"
      ],
      "css": [
        "/css/common.css",
        "/css/flagging.css",
        "/css/mentor-review.css"
      ],
      "js": [
        "/js/jquery-3.4.1.min.js",
        "/js/common.js",
        "/js/mentor-review.js"
      ]
    }
  ]
}