Examine source code of Emoji list

{
  "manifest_version": 2,
  "name": "Emoji",
  "version": "0.1.1resigned1",
  "description": "Show Emoji in current Browser Env",
  "icons": {
    "48": "48.png",
    "72": "72.png"
  },
  "browser_action": {
    "default_icon": "48.png",
    "default_title": "my title str",
    "default_popup": "index.html"
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{388b01a3-5891-44d0-ac23-c532202a7dc2}"
    }
  }
}