Examine source code of [cmd.ms]

{
  "name": "[cmd.ms]",
  "description": "Type 'c' <spacebar> and then type in the [cmd.ms] command.",
  "version": "0.4",
  "homepage_url": "https://cmd.ms",
  "author": "Merill Fernando",
  "omnibox": {
    "keyword": "c"
  },
  "icons": {
    "16": "img/icon-16.png",
    "32": "img/icon-32.png",
    "64": "img/icon-64.png",
    "128": "img/icon-128.png",
    "256": "img/icon-256.png",
    "512": "img/icon-512.png"
  },
  "manifest_version": 2,
  "background": {
    "scripts": [
      "background.js"
    ]
  },
  "browser_specific_settings": {
    "gecko": {
      "strict_min_version": "52.0a1",
      "id": "{533fb40d-f52f-4ed0-9ac5-d0ec142b05ad}"
    }
  }
}