manifest.json

{
  "manifest_version": 3,
  "name": "Emoji Menu",
  "description": "Enable an emoji picker in Chrome for all text areas and input fields.",
  "version": "0.1.2",
  "icons": {
    "16": "images/icon-16.png",
    "32": "images/icon-32.png",
    "48": "images/icon-48.png",
    "128": "images/icon-128.png"
  },
  "background": {
    "service_worker": "background.js",
    "type": "module"
  },
  "action": {
    "default_icon": {
      "16": "images/icon-16.png",
      "32": "images/icon-32.png",
      "48": "images/icon-48.png",
      "128": "images/icon-128.png"
    }
  },
  "permissions": ["scripting", "activeTab"],
  "commands": {
    "_execute_action": {
      "suggested_key": {
        "default": "Ctrl+B",
        "mac": "Command+B"
      }
    }
  }, 
  "content_scripts": [
    {
      "matches": ["<all_urls>"],
      "css": ["style.css"],
      "js": ["content-script.js"]
    }
  ]
}