Demoji

manifest.json

{
  "update_url": "https://clients2.google.com/service/update2/crx",
  "name": "Demoji",
  "description": "Expose a text description or emoji next to emoji images. Does not process free-text emoji.",
  "version": "1.2.0",
  "manifest_version": 3,
  "host_permissions": [
    "<all_urls>"
  ],
  "content_scripts": [
    {
      "matches": [
        "file://*/*",
        "http://*/*",
        "https://*/*"
      ],
      "js": [
        "demoji.js"
      ]
    }
  ],
  "web_accessible_resources": [
    {
      "resources": [
        "emoji-en-US.json"
      ],
      "matches": [
        "<all_urls>"
      ]
    }
  ],
  "action": {
    "default_icon": {
      "16": "icon-16.png",
      "32": "icon-32.png",
      "48": "icon-48.png",
      "128": "icon-128.png"
    }
  }
}