Examine source code of Panic_Button

{
  "manifest_version": 2,
  "name": "Panic Button",
  "version": "1.0",
  "description": "Press F8 to open a random professional website.",
  "permissions": [
    "activeTab"
  ],
  "background": {
    "scripts": [
      "background.js"
    ],
    "persistent": false
  },
  "commands": {
    "open-random-site": {
      "suggested_key": {
        "default": "F8"
      },
      "description": "Open a random professional website"
    }
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{404b56b1-a912-4b43-9ab5-9451aa449267}"
    }
  }
}