Trello Card Numbers

manifest.json

{
  "update_url": "https://clients2.google.com/service/update2/crx",
  "manifest_version": 2,
  "name": "Trello Card Numbers",
  "description": "Adds card numbers to a variety of places when using Trello.",
  "version": "2.3.0",
  "options_ui": {
    "page": "options.html",
    "chrome_style": true
  },
  "icons": {
    "16": "icon16.png",
    "48": "icon48.png",
    "128": "icon128.png"
  },
  "permissions": [
    "https://trello.com/*",
    "storage"
  ],
  "content_scripts": [
    {
      "matches": [
        "https://trello.com/*"
      ],
      "js": [
        "trello-card-numbers.js"
      ]
    }
  ]
}