Examine source code of Dolange

{
  "description": "Adds Persian to supported languages of Duolingo by translating Arabic language to Pesian. So that Persian users can use it to learn English or any other languages by creating an Arabic account.",
  "version": "1.31.5",
  "manifest_version": 2,
  "name": "Dolange",
  "options_page": "options.html",
  "background": {
    "scripts": [
      "background.bundle.js"
    ],
    "persistent": false
  },
  "browser_action": {
    "default_popup": "popup.html",
    "default_icon": {
      "16": "icon-16.png",
      "32": "icon-32.png",
      "48": "icon-48.png",
      "128": "icon-128.png"
    }
  },
  "permissions": [
    "storage",
    "unlimitedStorage",
    "https://translate.google.com/"
  ],
  "icons": {
    "16": "icon-16.png",
    "32": "icon-32.png",
    "48": "icon-48.png",
    "128": "icon-128.png"
  },
  "content_scripts": [
    {
      "matches": [
        "https://www.duolingo.com/*",
        "https://ar.duolingo.com/*",
        "https://en.duolingo.com/*"
      ],
      "js": [
        "contentScript.bundle.js"
      ],
      "css": [
        "content.styles.css"
      ]
    }
  ],
  "devtools_page": "devtools.html",
  "web_accessible_resources": [
    "content.styles.css",
    "icon-128.png",
    "icon-48.png",
    "icon-32.png",
    "icon-16.png",
    "circle-cross-svgrepo-com.svg",
    "affiliate.gif"
  ],
  "browser_specific_settings": {
    "gecko": {
      "id": "{2b1cf51f-8214-41c9-89b5-31502e91fda2}"
    }
  }
}