Sketch and Paint Plus!

manifest.json

{
  "update_url": "https://clients2.google.com/service/update2/crx",
  "name": "Sketch and Paint Plus!",
  "description": "Draw, paint, doodle, add text and emojis on browser tabs. Then save your creative art and decorations to share later.",
  "version": "0.0.0.2",
  "manifest_version": 3,
  "offline_enabled": true,
  "permissions": [
    "activeTab",
    "scripting"
  ],
  "icons": {
    "48": "./assets/icon48.png",
    "128": "./assets/icon128.png"
  },
  "action": {
    "default_icon": "./assets/icon128.png",
    "default_title": "Sketch and Paint Plus!"
  },
  "background": {
    "service_worker": "background.js",
    "matches": [
      "<all_urls>"
    ]
  },
  "web_accessible_resources": [
    {
      "resources": [
        "/assets/*"
      ],
      "matches": [
        "<all_urls>"
      ]
    }
  ]
}