Examine source code of ExcaliRooms

{
  "name": "ExcaliRooms",
  "version": "0.0.0",
  "description": "An awesome new browser extension",
  "homepage_url": "https://soundboards.app",
  "manifest_version": 2,
  "minimum_chrome_version": "121",
  "browser_specific_settings": {
    "gecko": {
      "id": "excalirooms@soundboards.app",
      "strict_min_version": "109.0"
    }
  },
  "icons": {
    "128": "icon128.png"
  },
  "permissions": [
    "storage",
    "identity",
    "tabs",
    "https://soundboards.app/*",
    "http://localhost:8033/*"
  ],
  "content_scripts": [
    {
      "matches": [
        "https://excalirooms.soundboards.app/*"
      ],
      "js": [
        "browser-polyfill.js",
        "content.js"
      ],
      "css": [
        "content.css"
      ],
      "run_at": "document_end"
    }
  ],
  "options_ui": {
    "page": "options.html",
    "open_in_tab": true
  },
  "browser_action": {
    "default_popup": "popup.html",
    "default_icon": {
      "16": "icon16.png",
      "48": "icon48.png",
      "128": "icon128.png"
    }
  },
  "content_security_policy": "script-src 'self' 'unsafe-eval' https://www.gstatic.com; object-src 'self'",
  "web_accessible_resources": [
    "browser-polyfill.js",
    "firebase-app-compat.js",
    "firebase-auth-compat.js",
    "firebase-ui-auth.js",
    "firebase-ui-auth.css"
  ]
}