Examine source code of DeTab - detach or disable tabs

{
  "manifest_version": 2,
  "name": "DeTab - detach or disable tabs",
  "version": "3.0.1",
  "description": "Extension that disables tabs by splitting them into new windows. Automatic (all tabs) or Manual (detach and reattach with keyboard shortcut). Made with tiling window managers in mind.",
  "background": {
    "scripts": [
      "browser-polyfill.js",
      "background.js"
    ]
  },
  "permissions": [
    "storage",
    "tabs",
    "notifications"
  ],
  "applications": {
    "gecko": {
      "id": "detab@tasos.bitsios.com"
    }
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "detab@tasos.bitsios.com"
    }
  },
  "commands": {
    "detach-tab": {
      "suggested_key": {
        "default": "Ctrl+Shift+Space"
      },
      "description": "Manually detach or reattach current tab from window"
    },
    "toggle-auto-detach-tab": {
      "suggested_key": {
        "default": "Ctrl+Shift+V"
      },
      "description": "Toggle auto detach of new created tabs"
    }
  },
  "icons": {
    "16": "icons/icon16.png",
    "48": "icons/icon48.png",
    "128": "icons/icon128.png"
  },
  "options_ui": {
    "page": "options.html",
    "browser_style": true
  }
}