Examine source code of anonymoX

{
  "name": "__MSG_appName__",
  "description": "__MSG_appDescription__",
  "manifest_version": 2,
  "applications": {
    "gecko": {
      "id": "client@anonymox.net",
      "strict_min_version": "91.1.0"
    }
  },
  "default_locale": "en",
  "version": "4.8.2",
  "homepage_url": "https://anonymox.net",
  "icons": {
    "48": "design/skin/icon48.png",
    "128": "design/skin/icon128.png"
  },
  "permissions": [
    "<all_urls>",
    "webRequest",
    "webRequestBlocking",
    "proxy",
    "storage",
    "tabs",
    "activeTab",
    "notifications"
  ],
  "background": {
    "scripts": [
      "external/jquery-3.3.1.min.js",
      "configuration.js",
      "network/thrift.js",
      "network/ClientService.js",
      "network/client_types.js",
      "network/network.js",
      "modules/state.js",
      "modules/ui.js",
      "modules/userdata.js",
      "modules/gateways.js",
      "modules/profiles.js",
      "proxy/auth.js",
      "proxy/proxy.js",
      "events/tabs.js",
      "events/intercom.js",
      "background.js"
    ]
  },
  "browser_action": {
    "default_icon": "design/skin/icon64.png",
    "default_title": "__MSG_appName__ panel",
    "default_popup": "ui/popup.html"
  },
  "options_ui": {
    "page": "ui/options.html",
    "browser_style": true,
    "open_in_tab": true
  },
  "content_scripts": [
    {
      "matches": [
        "https://anonymox.net/*",
        "https://www.anonymox.net/*",
        "https://*.anonymox.net/*"
      ],
      "js": [
        "contentscript/premiumlistener.js"
      ]
    }
  ]
}