Say Nope to Facebook Reactions

manifest.json

{
  "update_url": "https://clients2.google.com/service/update2/crx",
  "manifest_version": 2,
  "name": "Say Nope to Facebook Reactions",
  "description": "Disables annoying new Facebook reactions from showing when hovering.",
  "version": "1.0",
  "content_scripts": [
    {
      "matches": [
        "https://www.facebook.com/*"
      ],
      "js": [
        "index.js"
      ]
    }
  ]
}