Examine source code of Coin Pace

{
  "name": "Coin Pace",
  "description": "Get the latest COIN price changes",
  "version": "1.0",
  "manifest_version": 2,
  "browser_action": {
    "default_popup": "index.html",
    "default_title": "Coin Pace"
  },
  "icons": {
    "16": "logo192.png",
    "48": "logo192.png",
    "128": "logo192.png"
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{3f60cf9f-a1ac-4eaf-91e7-6ef636a5f815}"
    }
  }
}