Examine source code of Vanity

{
  "name": "Vanity",
  "version": "0.0.7",
  "description": "A highly customizable, modular productivity dashboard that replaces your New Tab page.",
  "icons": {
    "16": "vanity-icon-16.png",
    "32": "vanity-icon-32.png",
    "48": "vanity-icon-48.png",
    "128": "vanity-icon-128.png"
  },
  "chrome_url_overrides": {
    "newtab": "index.html"
  },
  "content_scripts": [
    {
      "matches": [
        "https://vanityapp.cc/*",
        "https://www.vanityapp.cc/*",
        "https://*.vanityapp.cc/*",
        "http://localhost/*",
        "http://127.0.0.1/*"
      ],
      "js": [
        "assets/authBridgeContent.js"
      ],
      "run_at": "document_idle"
    }
  ],
  "manifest_version": 2,
  "permissions": [
    "bookmarks",
    "storage",
    "identity",
    "sessions",
    "tabs",
    "topSites",
    "activeTab",
    "<all_urls>"
  ],
  "background": {
    "scripts": [
      "assets/background.js"
    ],
    "persistent": false
  },
  "web_accessible_resources": [
    "index.html"
  ],
  "browser_action": {
    "default_title": "Vanity",
    "default_icon": {
      "16": "vanity-icon-16.png",
      "32": "vanity-icon-32.png",
      "48": "vanity-icon-48.png",
      "128": "vanity-icon-128.png"
    }
  },
  "commands": {
    "quick-capture": {
      "suggested_key": {
        "default": "Alt+Shift+Q",
        "mac": "Alt+Shift+Q"
      },
      "description": "Quick save current page to Vanity Bookmarks"
    },
    "_execute_browser_action": {
      "suggested_key": {
        "default": "Ctrl+Shift+Y",
        "mac": "Command+Shift+Y"
      }
    }
  },
  "content_security_policy": "script-src 'self'; object-src 'self'",
  "browser_specific_settings": {
    "gecko": {
      "id": "vanity@vanityapp.cc",
      "strict_min_version": "140.0",
      "data_collection_permissions": {
        "required": [
          "personallyIdentifyingInfo",
          "authenticationInfo"
        ]
      }
    },
    "gecko_android": {
      "strict_min_version": "142.0"
    }
  }
}