Examine source code of Compare Text

{
  "description": "This extension allows you to compare / diff text just in your browser! Free and Open Source",
  "version": "3.1",
  "homepage_url": "https://github.com/KovalchukDanil0/CompareText.git",
  "background": {
    "page": "background.bundle.js"
  },
  "manifest_version": 3,
  "name": "Compare Text",
  "author": "Gomofob",
  "browser_specific_settings": {
    "gecko": {
      "id": "CompareText@gomofob.com",
      "strict_min_version": "109.0"
    }
  },
  "icons": {
    "16": "icon-16.png",
    "32": "icon-32.png",
    "64": "icon-64.png",
    "128": "icon-128.png"
  },
  "action": {
    "default_title": "Click to open popup",
    "default_popup": "popup.html"
  },
  "permissions": [
    "storage",
    "contextMenus"
  ]
}