Card counter for Trello

manifest.json

{
  "update_url": "https://clients2.google.com/service/update2/crx",
  "manifest_version": 3,
  "name": "Card counter for Trello",
  "version": "1.0.2",
  "description": "Show card count in your Trello lanes",
  "icons": {
    "16": "icons/icon16.png",
    "48": "icons/icon48.png",
    "128": "icons/icon128.png"
  },
  "author": "matsuoshi",
  "homepage_url": "https://github.com/matsuoshi/Card-counter-for-Trello",
  "content_scripts": [
    {
      "matches": [
        "https://trello.com/*"
      ],
      "css": [
        "style.css"
      ]
    }
  ]
}