Gmail message ID finder

manifest.json

{
  "update_url": "https://clients2.google.com/service/update2/crx",
  "name": "Gmail message ID finder",
  "short_name": "Gmail ID finder",
  "description": "Adds a 'Copy message ID' button to Gmail messages which generates a search term that you can later use to get back to your message.",
  "version": "1.0.2",
  "author": "Tim van Dalen <[email protected]>",
  "content_scripts": [
    {
      "matches": [
        "https://mail.google.com/*",
        "https://inbox.google.com/*"
      ],
      "js": [
        "inboxsdk.js",
        "content.js"
      ],
      "run_at": "document_end"
    }
  ],
  "permissions": [
    "https://mail.google.com/",
    "https://inbox.google.com/",
    "clipboardWrite"
  ],
  "web_accessible_resources": [
    "page.js"
  ],
  "icons": {
    "16": "icon16.png",
    "48": "icon48.png",
    "128": "icon128.png"
  },
  "manifest_version": 2
}