Examine source code of Phrasal Verb Quiz

{
  "manifest_version": 2,
  "name": "Phrasal Verb Quiz",
  "version": "1.0",
  "description": "A simple, engaging add-on that helps users practice English phrasal verbs by matching them to their Vietnamese translations. Ideal for English learners looking to boost their vocabulary skills.",
  "icons": {
    "48": "phrasal_icon.png"
  },
  "browser_action": {
    "default_popup": "index.html",
    "default_title": "Phrasal Verb Quiz"
  },
  "permissions": [],
  "browser_specific_settings": {
    "gecko": {
      "id": "{20811845-6555-46c9-bda3-bbe03882aa9b}"
    }
  }
}