Make your life - Tie Dye

manifest.json

{
  "update_url": "https://clients2.google.com/service/update2/crx",
  "name": "Make your life - Tie Dye",
  "version": "1.0.1",
  "description": "Makes the biggest title in the HTML colored as tie dye.",
  "manifest_version": 3,
  "background": {
    "service_worker": "background.js"
  },
  "content_scripts": [
    {
      "run_at": "document_start",
      "matches": [
        "*://*/*"
      ],
      "js": [
        "contentscript.js"
      ],
      "css": [
        "contentStyle.css"
      ]
    }
  ],
  "action": {
    "default_popup": "contextMenu.html"
  },
  "icons": {
    "32": "icons/td.png",
    "48": "icons/td48.png"
  },
  "permissions": [
    "activeTab",
    "storage"
  ]
}