Examine source code of QuickEdit

{
  "manifest_version": 2,
  "name": "QuickEdit",
  "description": "Edit websites quicker than ever",
  "version": "1.0",
  "homepage_url": "https://github.com/DinoscapeProgramming/quickedit",
  "author": "Dinoscape",
  "browser_action": {
    "default_icon": "icons/512x512.png",
    "default_popup": "popup.html",
    "default_title": "QuickEdit"
  },
  "background": {
    "scripts": [
      "background.js"
    ]
  },
  "permissions": [
    "activeTab",
    "<all_urls>",
    "contextMenus"
  ],
  "commands": {
    "commandEditPage": {
      "suggested_key": {
        "default": "Alt+Q"
      },
      "description": "Edit websites quicker than ever"
    }
  },
  "icons": {
    "16": "icons/16x16.png",
    "48": "icons/48x48.png",
    "128": "icons/128x128.png"
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{5444af6c-7823-4657-8235-aa220fbfb0ee}"
    }
  }
}