Examine source code of Advanced Proxy Manager

{
  "manifest_version": 3,
  "name": "__MSG_extName__",
  "description": "__MSG_extDescription__",
  "version": "1.5.0",
  "icons": {
    "16": "logo3x-disabled.png",
    "48": "logo3x-disabled.png",
    "128": "logo3x-disabled.png"
  },
  "default_locale": "en",
  "permissions": [
    "activeTab",
    "cookies",
    "tabs",
    "privacy",
    "proxy",
    "webRequest",
    "webRequestAuthProvider",
    "storage",
    "unlimitedStorage"
  ],
  "host_permissions": [
    "<all_urls>"
  ],
  "content_security_policy": {
    "extension_pages": "script-src 'self'"
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "proxy-manager@proxy-cheap.com",
      "strict_min_version": "91.1.0"
    }
  },
  "background": {
    "scripts": [
      "background.js"
    ]
  },
  "action": {
    "default_title": "Proxy-Cheap Proxy Manager",
    "default_popup": "popup.html"
  },
  "options_ui": {
    "page": "options.html"
  }
}