Examine source code of Shorter is Better!

{
  "manifest_version": 2,
  "name": "Shorter is Better!",
  "version": "1.0.0",
  "description": "Create custom short URLs, generate QR codes, and monitor every click in real time.",
  "permissions": [
    "activeTab",
    "storage",
    "contextMenus",
    "https://minzo.link/usethisapi/*"
  ],
  "background": {
    "scripts": [
      "background.js"
    ]
  },
  "browser_action": {
    "default_popup": "popup.html",
    "default_icon": {
      "16": "minzo-16x16.png",
      "48": "minzo-48x48.png",
      "128": "minzo-128x128.png"
    }
  },
  "icons": {
    "16": "minzo-16x16.png",
    "48": "minzo-48x48.png",
    "128": "minzo-128x128.png"
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "contact@minzo.com",
      "strict_min_version": "58.0"
    }
  }
}