Examine source code of NEXXT TABS

{
  "manifest_version": 3,
  "version": "4.0",
  "name": "__MSG_appName__",
  "description": "__MSG_appDesc__",
  "action": {
    "default_icon": "icon.png"
  },
  "default_locale": "en",
  "chrome_url_overrides": {
    "newtab": "index.html"
  },
  "permissions": [
    "unlimitedStorage",
    "search"
  ],
  "icons": {
    "128": "icon128.png"
  },
  "author": "NoCymer",
  "chrome_settings_overrides": {
    "homepage": "index.html"
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{8f518d75-6943-4c0e-9f28-224d4712cc03}",
      "strict_min_version": "42.0"
    }
  }
}