Examine source code of Impulse Purchase Blocker

{
  "manifest_version": 2,
  "name": "Impulse Purchase Blocker",
  "version": "1.0",
  "description": "A simple utility to remind you not to spend money, to stop/delay any impulse purchase. Currently, it works on some of the most used websites, but if you observe any website where it is not working, please leave the name of the website in the review.",
  "icons": {
    "48": "icon.png",
    "96": "icon.png"
  },
  "content_scripts": [
    {
      "matches": [
        "<all_urls>"
      ],
      "js": [
        "script.js"
      ]
    }
  ]
}