Examine source code of URL Forwarder

{
  "name": "URL Forwarder",
  "description": "Redirect, block and do native processing of links.",
  "version": "1.2resigned1",
  "browser_action": {
    "browser_style": true,
    "default_popup": "popup.html",
    "default_icon": "icon.png"
  },
  "icons": {
    "16": "icon.png",
    "48": "icon48.png",
    "128": "icon128.png"
  },
  "background": {
    "scripts": [
      "background.js"
    ]
  },
  "options_ui": {
    "page": "options.html",
    "chrome_style": true
  },
  "permissions": [
    "nativeMessaging",
    "tabs",
    "<all_urls>",
    "webRequest",
    "webRequestBlocking",
    "storage"
  ],
  "manifest_version": 2,
  "applications": {
    "gecko": {
      "id": "{bff638ba-59df-4985-af17-982ef7cf0a53}"
    }
  }
}