Examine source code of Close Figma Tab

{
  "name": "Close Figma Tab",
  "version": "0.0.1",
  "manifest_version": 2,
  "description": "Close Figma tab if you have \"Open in Desktop App\" active",
  "homepage_url": "https://github.com/mamuso/close-figma-tab",
  "icons": {
    "48": "icons/48.png",
    "96": "icons/96.png",
    "128": "icons/128.png"
  },
  "background": {
    "scripts": [
      "js/background.js"
    ],
    "persistent": false
  },
  "content_scripts": [
    {
      "matches": [
        "http://*.figma.com/file/*",
        "https://*.figma.com/file/*"
      ],
      "js": [
        "js/content.js"
      ],
      "run_at": "document_end"
    }
  ],
  "permissions": [
    "activeTab"
  ]
}