Examine source code of QuickShot

{
  "manifest_version": 2,
  "permissions": [
    "storage",
    "tabs"
  ],
  "icons": {
    "16": "icon-16.png",
    "32": "icon-32.png",
    "48": "icon-48.png",
    "128": "icon-128.png"
  },
  "browser_action": {
    "browser_style": true,
    "default_icon": "icon-32.png",
    "default_popup": "src/popup/index.html",
    "default_title": "Quick Shot"
  },
  "background": {
    "scripts": [
      "src/background.js"
    ]
  },
  "content_scripts": [
    {
      "matches": [
        "<all_urls>"
      ],
      "js": [
        "src/content.js"
      ],
      "css": [
        "style.css"
      ]
    }
  ],
  "commands": {
    "start": {
      "description": "Start QuickShot",
      "suggested_key": {
        "default": "Alt+Q"
      }
    }
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{2f2e78a7-e3f5-443f-8a55-27be46d129e8}"
    }
  },
  "name": "QuickShot",
  "description": "Quickly navigate between URLs using hotkeys",
  "version": "2.2.1"
}