Examine source code of Math Sprint

{
  "manifest_version": 2,
  "name": "Math Sprint",
  "version": "1.0",
  "description": "Sharpen your mind with Math Sprint! A fast-paced extension that challenges your mental math skills with random arithmetic problems.",
  "icons": {
    "48": "math_icon.png"
  },
  "browser_action": {
    "default_popup": "index.html",
    "default_title": "Math Sprint"
  },
  "permissions": [],
  "browser_specific_settings": {
    "gecko": {
      "id": "{4bd27a8b-3735-4ebf-967c-c15b47090401}",
      "data_collection_permissions": {
        "required": [
          "none"
        ],
        "optional": []
      }
    }
  }
}