Examine source code of vetri 2026 Countdown

{
  "manifest_version": 2,
  "name": "Tết 2026 Countdown",
  "version": "1.0",
  "description": "A Firefox add-on that counts down to Tết Nguyên Đán 2026 with a festive design. Works on desktop and Android.",
  "icons": {
    "48": "images/icon_48.png",
    "96": "images/icon_96.png",
    "128": "images/icon_128.png"
  },
  "browser_action": {
    "default_popup": "popup/popup.html",
    "default_title": "Tết 2026 Countdown"
  },
  "chrome_url_overrides": {
    "newtab": "newtab/newtab.html"
  },
  "permissions": [],
  "browser_specific_settings": {
    "gecko": {
      "id": "{a0672c61-f482-40c0-89ad-8de24ecf789b}",
      "strict_min_version": "68.0"
    }
  }
}