Trello Bug Feature Colors

Sets colors on Trello cards
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manifest.json
{
  "update_url": "https://clients2.google.com/service/update2/crx",
  "content_scripts": [
    {
      "js": [
        "js/content.js"
      ],
      "matches": [
        "https://trello.com/*"
      ]
    }
  ],
  "description": "Sets colors on Trello cards",
  "icons": {
    "128": "img/icon128.png"
  },
  "manifest_version": 3,
  "name": "Trello Bug Feature Colors",
  "version": "4.0"
}