Examine source code of TST New Tabs First

{
  "manifest_version": 2,
  "name": "TST New Tabs First",
  "version": "0.2.1",
  "description": "New root tabs are placed at the top of the Tree Style Tab sidebar.",
  "background": {
    "scripts": [
      "background.js"
    ]
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{9a384994-54cf-4e15-81e2-b5bd41459677}"
    }
  }
}