Examine source code of Edit with Sublime Text

{
  "name": "Edit with Sublime Text",
  "description": "Edit an HTML element and all its child nodes in Sublime Text editor with real-time updates",
  "version": "0.1.5",
  "manifest_version": 2,
  "permissions": [
    "storage",
    "activeTab",
    "nativeMessaging",
    "notifications",
    "contextMenus"
  ],
  "optional_permissions": [
    "downloads",
    "<all_urls>"
  ],
  "background": {
    "persistent": false,
    "scripts": [
      "config.js",
      "common.js"
    ]
  },
  "offline_enabled": true,
  "browser_action": {},
  "devtools_page": "devtools/index.html",
  "options_ui": {
    "page": "data/options/index.html",
    "chrome_style": true
  },
  "icons": {
    "16": "data/icons/16.png",
    "32": "data/icons/32.png",
    "48": "data/icons/48.png",
    "64": "data/icons/64.png",
    "128": "data/icons/128.png",
    "256": "data/icons/256.png",
    "512": "data/icons/512.png"
  },
  "homepage_url": "https://add0n.com/edit-as-html.html?from=sublime"
}