Heart React for Messenger

manifest.json

{
  "update_url": "https://clients2.google.com/service/update2/crx",
  "name": "Heart React for Messenger",
  "description": "Adds the ❤️ heart ❤️ reaction to Facebook Messenger reactions",
  "version": "1.6.1",
  "manifest_version": 2,
  "icons": {
    "16": "icons/icon16.png",
    "32": "icons/icon32.png",
    "48": "icons/icon48.png",
    "64": "icons/icon64.png",
    "128": "icons/icon128.png"
  },
  "content_scripts": [
    {
      "matches": [
        "https://www.facebook.com/messages/*",
        "http://www.facebook.com/messages/*",
        "https://www.messenger.com/*",
        "http://www.messenger.com/*",
        "https://www.facebook.com/*",
        "http://www.facebook.com/*"
      ],
      "js": [
        "js/inject-script.js"
      ],
      "all_frames": true,
      "run_at": "document_end"
    }
  ],
  "web_accessible_resources": [
    "js/fb-heart-react.js"
  ]
}