Examine source code of Zen Browser Tab Switcher

{
  "manifest_version": 2,
  "name": "Zen Browser Tab Switcher",
  "version": "1.2.4",
  "description": "Tab switcher for Zen Browser with a minimal omnibar overlay",
  "permissions": [
    "storage",
    "tabs",
    "<all_urls>"
  ],
  "web_accessible_resources": [
    "fonts/manrope/manrope.woff2",
    "utils.js"
  ],
  "options_ui": {
    "page": "options.html",
    "open_in_tab": true
  },
  "commands": {
    "show-zen-browner-tab-switcher-omnibar": {
      "suggested_key": {
        "default": "Alt+T",
        "mac": "MacCtrl+T"
      },
      "description": "Open tab switcher omnibar"
    }
  },
  "background": {
    "page": "background.html",
    "persistent": true
  },
  "content_scripts": [
    {
      "matches": [
        "<all_urls>"
      ],
      "js": [
        "content.js"
      ],
      "css": [
        "content.css"
      ],
      "run_at": "document_end"
    }
  ],
  "browser_specific_settings": {
    "gecko": {
      "id": "zen-browser-tab-switcher@zen-browser-addons.mwco.app",
      "data_collection_permissions": {
        "required": [
          "none"
        ]
      }
    }
  },
  "icons": {
    "48": "icons/icon-48.png",
    "96": "icons/icon-96.png"
  }
}