Examine source code of Amazon Reviewer

{
  "manifest_version": 3,
  "name": "Amazon Reviewer",
  "description": "Make amazon products with few reviewers a translucent color.",
  "version": "1.0.1",
  "homepage_url": "https://farorbit.itch.io",
  "icons": {
    "16": "icons/icon16.png",
    "32": "icons/icon32.png",
    "48": "icons/icon48.png",
    "128": "icons/icon128.png"
  },
  "content_scripts": [
    {
      "matches": [
        "https://*.amazon.com/*"
      ],
      "js": [
        "content.js"
      ]
    }
  ],
  "browser_specific_settings": {
    "gecko": {
      "id": "amazonreviewer@protop"
    }
  }
}