Examine source code of Amazon Cart Hider

{
  "manifest_version": 2,
  "name": "Amazon Cart Hider",
  "description": "Hides the Amazon cart sidebar",
  "version": "1.0",
  "icons": {
    "64": "icons/icon.png"
  },
  "content_scripts": [
    {
      "matches": [
        "*://*.amazon.com/*"
      ],
      "js": [
        "content_script.js"
      ]
    }
  ]
}