Examine source code of Enable UI3 Beta for Figma

{
  "manifest_version": 3,
  "name": "Enable UI3 Beta for Figma",
  "version": "1.0.2",
  "description": "This extension enables UI3 Beta for Figma for all users, without the need to wait on the waitlist.",
  "icons": {
    "48": "icons/48x48.png"
  },
  "permissions": [
    "declarativeNetRequest",
    "declarativeNetRequestWithHostAccess"
  ],
  "declarative_net_request": {
    "rule_resources": [
      {
        "id": "ruleset_1",
        "enabled": true,
        "path": "rules/ruleset_1.json"
      }
    ]
  },
  "host_permissions": [
    "https://www.figma.com/*"
  ],
  "web_accessible_resources": [
    {
      "resources": [
        "src/format.js"
      ],
      "matches": [
        "<all_urls>"
      ]
    }
  ],
  "browser_specific_settings": {
    "gecko": {
      "id": "ui3betatime@inclushe.com",
      "strict_min_version": "113.0"
    }
  }
}