Examine source code of Next Tech

{
  "manifest_version": 2,
  "name": "Next Tech",
  "description": "Quickly launch a Next Tech sandbox from anywhere on the web!",
  "version": "0.0.0.1",
  "browser_action": {
    "default_icon": "./images/NextTech_mark_transparent48.png",
    "default_title": "Next Tech",
    "default_popup": "popup.html"
  },
  "icons": {
    "16": "./images/NextTech_mark_transparent16.png",
    "48": "./images/NextTech_mark_transparent48.png"
  },
  "permissions": []
}