Good Gantt

manifest.json

{
  "update_url": "https://clients2.google.com/service/update2/crx",
  "name": "Good Gantt",
  "description": "Gantt Chart for Trello",
  "version": "3.1.1",
  "manifest_version": 3,
  "icons": {
    "16": "./icons/favicon-16.png",
    "48": "./icons/favicon-48.png",
    "128": "./icons/favicon-128.png"
  },
  "content_scripts": [
    {
      "run_at": "document_end",
      "matches": [
        "https://trello.com/*"
      ],
      "js": [
        "./content.js"
      ],
      "css": [
        "./content.css"
      ]
    }
  ],
  "permissions": [],
  "content_security_policy": {
    "extension_pages": "default-src 'self'; style-src 'self' 'unsafe-inline'; img-src 'self' data:; frame-src https://trello.com/"
  }
}