Examine source code of LeetTest

{
  "manifest_version": 3,
  "name": "LeetTest",
  "version": "1.3.2",
  "description": "LeetCode Test Case Generator",
  "action": {
    "default_popup": "popup.html"
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "leet@test.com"
    }
  },
  "permissions": [
    "tabs",
    "scripting"
  ],
  "background": {
    "service_worker": "scripts/background.js",
    "scripts": [
      "scripts/background.js"
    ]
  },
  "host_permissions": [
    "https://kohlenz.com/*",
    "https://leetcode.com/*"
  ],
  "content_scripts": [
    {
      "js": [
        "scripts/backend-config.js",
        "scripts/inject.js",
        "scripts/modify.js"
      ],
      "matches": [
        "https://leetcode.com/problems/*"
      ]
    }
  ],
  "icons": {
    "16": "icons/icon-16.png",
    "48": "icons/icon-48.png",
    "96": "icons/icon-96.png",
    "128": "icons/icon-128.png"
  },
  "web_accessible_resources": [
    {
      "resources": [
        "scripts/companies.json"
      ],
      "matches": [
        "<all_urls>"
      ]
    }
  ]
}