Examine source code of Tracking Query Remover

{
  "manifest_version": 2,
  "name": "Tracking Query Remover",
  "description": "Removes useless tracking information from url",
  "version": "1.1.0",
  "content_scripts": [
    {
      "matches": [
        "<all_urls>"
      ],
      "js": [
        "content.js"
      ],
      "run_at": "document_start"
    }
  ],
  "icons": {
    "16": "icon16.png",
    "48": "icon48.png",
    "128": "icon128.png"
  }
}