Examine source code of Grammar Guard

{
  "manifest_version": 2,
  "name": "Grammar Guard",
  "version": "1.0",
  "description": "An interactive browser extension designed to sharpen your proofreading skills. Challenge yourself to identify and correct grammatical errors or typos in various sentences, perfect for writers, students, and language enthusiasts.",
  "icons": {
    "48": "guard-icon.png"
  },
  "browser_action": {
    "default_popup": "index.html",
    "default_title": "Grammar Guard"
  },
  "permissions": [],
  "browser_specific_settings": {
    "gecko": {
      "id": "{4c49c3eb-c1ca-493e-9862-42d626d5dcc0}",
      "data_collection_permissions": {
        "required": [
          "none"
        ],
        "optional": []
      }
    }
  }
}