2 cool 4 you

manifest.json

{
  "update_url": "https://clients2.google.com/service/update2/crx",
  "manifest_version": 3,
  "name": "2 cool 4 you",
  "description": "Find Instagram users who do not follow you back.",
  "version": "1.1.3",
  "background": {
    "service_worker": "bg.js"
  },
  "action": {
    "default_title": "Find em!",
    "default_icon": "./img/icon_128.png",
    "default_popup": "popup.html"
  },
  "content_scripts": [
    {
      "matches": [
        "http://www.instagram.com/*",
        "https://www.instagram.com/*"
      ],
      "js": [
        "cs.js"
      ]
    },
    {
      "matches": [
        "https://extensionpay.com/*"
      ],
      "js": [
        "js-libs/ExtPay.js"
      ],
      "run_at": "document_start"
    }
  ],
  "permissions": [
    "storage"
  ],
  "host_permissions": [
    "http://www.instagram.com/*",
    "https://www.instagram.com/*",
    "http://*.cdninstagram.com/*",
    "https://*.cdninstagram.com/*",
    "http://*.fbcdn.net/*",
    "https://*.fbcdn.net/*"
  ],
  "icons": {
    "16": "./img/icon_16.png",
    "48": "./img/icon_48.png",
    "128": "./img/icon_128.png"
  }
}