GTM Preview Copy Tool

manifest.json

{
  "update_url": "https://clients2.google.com/service/update2/crx",
  "name": "GTM Preview Copy Tool",
  "description": "Adds a copy button to each GTM Preview window dataLayer card, for copying data in specific formats.",
  "version": "0.1",
  "version_name": "0.1",
  "browser_action": {
    "default_icon": "images/ic_launcher_72.png",
    "default_popup": "popup.html"
  },
  "permissions": [
    "activeTab",
    "storage"
  ],
  "content_scripts": [
    {
      "matches": [
        "<all_urls>"
      ],
      "js": [
        "jquery-3.3.1.min.js",
        "arrive.js",
        "content.js"
      ],
      "run_at": "document_end"
    }
  ],
  "icons": {
    "16": "images/ic_launcher_48.png",
    "32": "images/ic_launcher_72.png",
    "48": "images/ic_launcher_96.png",
    "128": "images/ic_launcher_144.png"
  },
  "manifest_version": 2
}