Examine source code of Simple Emoji Picker

{
  "manifest_version": 2,
  "name": "Simple Emoji Picker",
  "version": "1.0",
  "description": "Select and copy emojis easily.",
  "browser_action": {
    "default_popup": "popup.html",
    "default_title": "Simple Emoji Picker"
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{85d99aca-9ee4-48d6-abe7-12b1b2bf1bf5}"
    }
  }
}