Examine source code of TinyURL Shortener

{
  "manifest_version": 2,
  "name": "TinyURL Shortener",
  "version": "1.0",
  "description": "Shorten current URL using TinyURL API.",
  "icons": {
    "64": "icon64.png",
    "128": "icon128.png"
  },
  "permissions": [
    "tabs",
    "clipboardWrite",
    "https://tinyurl.com/*"
  ],
  "browser_action": {
    "default_title": "Shorten URL",
    "default_icon": "icon64.png"
  },
  "background": {
    "scripts": [
      "background.js"
    ]
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{13f96856-d4c2-490b-a233-80acf2ca51de}",
      "strict_min_version": "107.0"
    }
  }
}