Examine source code of Container Hotkeys

{
  "manifest_version": 2,
  "name": "Container Hotkeys",
  "version": "1.4resigned1",
  "description": "Adds a hotkey to \"Open New Tab in Container\" and \"Toggle Container's Tab Visibility\".",
  "icons": {
    "16": "icon16.png",
    "24": "icon24.png",
    "32": "icon32.png",
    "48": "icon.svg",
    "64": "icon64.png",
    "96": "icon.svg",
    "128": "icon128.png",
    "256": "icon256.png",
    "512": "icon512.png"
  },
  "commands": {
    "toggle-tab-visibility": {
      "suggested_key": {
        "default": "Ctrl+Alt+B"
      },
      "description": "Toggle visibility of all tabs in container."
    },
    "open-new-tab": {
      "suggested_key": {
        "default": "Ctrl+Alt+T"
      },
      "description": "Opens a new tab in this container."
    }
  },
  "background": {
    "scripts": [
      "background.js"
    ]
  },
  "permissions": [
    "tabs",
    "tabHide",
    "contextualIdentities",
    "cookies",
    "notifications",
    "storage"
  ],
  "options_ui": {
    "page": "options.html",
    "browser_style": true
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{623c8754-ad92-4667-9acf-7241a2923b2f}"
    }
  }
}