Examine source code of Spelling Sprint

{
  "manifest_version": 2,
  "name": "Spelling Sprint",
  "version": "1.0",
  "description": "A fun browser extension that challenges users to identify the correct spelling of commonly misspelled English words. Ideal for language learners and anyone looking to sharpen their spelling skills through engaging quizzes.",
  "icons": {
    "48": "icon.png"
  },
  "browser_action": {
    "default_popup": "index.html",
    "default_title": "Spelling Sprint"
  },
  "permissions": [],
  "browser_specific_settings": {
    "gecko": {
      "id": "{4ba3930a-ffcd-4179-be26-717967d2acda}"
    }
  }
}