Examine source code of Proxy Toggle Extension

{
  "manifest_version": 3,
  "name": "Proxy Toggle Extension",
  "version": "1.25",
  "permissions": [
    "proxy",
    "webRequest",
    "webRequestBlocking",
    "webRequestAuthProvider",
    "storage",
    "tabs",
    "activeTab",
    "scripting",
    "webNavigation",
    "declarativeNetRequest",
    "declarativeNetRequestWithHostAccess",
    "browsingData"
  ],
  "host_permissions": [
    "<all_urls>"
  ],
  "background": {
    "scripts": [
      "background.js"
    ]
  },
  "action": {
    "default_title": "Proxy Toggle"
  },
  "content_scripts": [
    {
      "matches": [
        "<all_urls>"
      ],
      "js": [
        "content.js"
      ],
      "run_at": "document_start"
    }
  ],
  "web_accessible_resources": [
    {
      "resources": [
        "userscript.js"
      ],
      "matches": [
        "<all_urls>"
      ]
    }
  ],
  "icons": {
    "48": "images/icon48.png",
    "128": "images/icon128.png"
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "proxy-toggle@example.com",
      "strict_min_version": "91.1.0"
    },
    "gecko_android": {
      "strict_min_version": "113.0"
    }
  }
}