Examine source code of Quick Tab Hide & Restore

{
  "manifest_version": 2,
  "name": "Quick Tab Hide & Restore",
  "version": "1.0",
  "description": "Quickly hide and restore all tabs using keyboard shortcuts.",
  "permissions": [
    "tabs",
    "storage"
  ],
  "background": {
    "scripts": [
      "background.js"
    ]
  },
  "commands": {
    "hide-tabs": {
      "suggested_key": {
        "default": "Alt+H"
      },
      "description": "Hide all tabs"
    },
    "restore-tabs": {
      "suggested_key": {
        "default": "Alt+R"
      },
      "description": "Restore hidden tabs"
    }
  },
  "icons": {
    "48": "icons/icon.png"
  },
  "applications": {
    "gecko": {
      "id": "quicktabhide@example.com",
      "strict_min_version": "68.0"
    }
  }
}