Examine source code of NewTabFromPinnedOnRight

{
  "manifest_version": 2,
  "name": "NewTabFromPinnedOnRight",
  "description": "Open new tabs opened from pinned tabs on the far right of the tab bar.",
  "version": "0.0.2resigned1",
  "background": {
    "scripts": [
      "background.js"
    ]
  },
  "icons": {
    "64": "icons/icon.png"
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{ad533597-2e29-40f1-afbe-675e7158928b}"
    }
  }
}