Examine source code of TargetKiller

{
  "manifest_version": 2,
  "name": "TargetKiller",
  "description": "Open all links in current tab, ignoring any HTML target.",
  "version": "0.9.2resigned1",
  "content_scripts": [
    {
      "matches": [
        "<all_urls>"
      ],
      "js": [
        "contentscript.js"
      ]
    }
  ],
  "browser_specific_settings": {
    "gecko": {
      "id": "{68673b75-7866-4ca1-bcc3-cfc7f1567127}"
    }
  }
}