Examine source code of TravianStat HTML Sender

{
  "manifest_version": 2,
  "name": "TravianStat HTML Sender",
  "version": "4.4",
  "description": "Envio de información contra travian",
  "permissions": [
    "storage",
    "webRequest",
    "webRequestBlocking",
    "tabs",
    "activeTab",
    "<all_urls>",
    "*://*.travian.com/*",
    "*://*.travian.net/*",
    "*://*.travian.es/*",
    "*://*.hispano.travian.com/*"
  ],
  "browser_action": {
    "default_popup": "popup.html",
    "default_icon": "icons/ts.png"
  },
  "background": {
    "scripts": [
      "background.js"
    ],
    "persistent": true
  },
  "icons": {
    "16": "icons/ts.png",
    "48": "icons/ts.png",
    "128": "icons/ts.png"
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{6861ff40-a252-49fe-bec1-c69819fe2ed3}",
      "strict_min_version": "109.0"
    }
  }
}