Examine source code of Quick History Access

{
  "manifest_version": 2,
  "name": "__MSG_extensionName__",
  "version": "1.0.0",
  "description": "__MSG_extensionDescription__",
  "permissions": [
    "history",
    "storage",
    "activeTab"
  ],
  "browser_action": {
    "default_popup": "popup.html",
    "default_icon": {
      "48": "icons/icon-48.png",
      "96": "icons/icon-96.png"
    }
  },
  "background": {
    "scripts": [
      "background.js"
    ],
    "persistent": false
  },
  "commands": {
    "open_history": {
      "suggested_key": {
        "default": "Ctrl+Shift+H",
        "mac": "Command+Shift+H"
      },
      "description": "Open History Page"
    }
  },
  "icons": {
    "48": "icons/icon-48.png",
    "96": "icons/icon-96.png"
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{6ca8c5c8-01a8-480c-9aef-6329591b0866}"
    }
  }
}