Examine source code of CORS Unlocker

{
  "name": "__MSG_extName__",
  "description": "__MSG_extDescription__",
  "version": "1.1.0",
  "manifest_version": 3,
  "browser_specific_settings": {
    "gecko": {
      "id": "cors-unlocker@forth.ink"
    }
  },
  "icons": {
    "16": "icon/16.png",
    "32": "icon/32.png",
    "128": "icon/128.png"
  },
  "options_page": "src/options/index.html",
  "action": {
    "default_popup": "src/popup/index.html"
  },
  "content_scripts": [
    {
      "matches": [
        "https://*.forth.ink/*"
      ],
      "js": [
        "src/content/firefox-bridge.js"
      ],
      "run_at": "document_start",
      "all_frames": true
    }
  ],
  "default_locale": "en",
  "background": {
    "scripts": [
      "src/background/index.js"
    ]
  },
  "permissions": [
    "declarativeNetRequest",
    "declarativeNetRequestWithHostAccess",
    "tabs",
    "storage"
  ],
  "host_permissions": [
    "<all_urls>"
  ]
}