Canvas Capture

manifest.json

{
  "update_url": "https://clients2.google.com/service/update2/crx",
  "name": "Canvas Capture",
  "version": "0.3",
  "manifest_version": 3,
  "description": "Canvas Element capture and auto named.",
  "action": {
    "default_icon": {
      "16": "icon16.png",
      "48": "icon48.png",
      "128": "icon128.png"
    }
  },
  "permissions": [
    "activeTab",
    "downloads",
    "storage"
  ],
  "background": {
    "service_worker": "background.js"
  },
  "content_scripts": [
    {
      "matches": [
        "http://*/*",
        "https://*/*"
      ],
      "js": [
        "contentscript.js"
      ],
      "run_at": "document_idle",
      "all_frames": false
    }
  ],
  "options_ui": {
    "open_in_tab": false,
    "page": "option.html"
  },
  "icons": {
    "16": "icon16.png",
    "48": "icon48.png",
    "128": "icon128.png"
  }
}