Examine source code of Tazfiliate

{
  "name": "Tazfiliate",
  "version": "1.2.3",
  "manifest_version": 2,
  "description": "Support me with no money! This app replaces product links with my affiliate tags so you can support me without thinking! Thank you!",
  "icons": {
    "16": "icon16.png",
    "32": "icon32.png",
    "64": "icon64.png",
    "128": "icon128.png"
  },
  "content_scripts": [
    {
      "matches": [
        "*://*.amazon.com/*",
        "*://*.amazon.co.uk/*",
        "*://*.amazon.com.br/*",
        "*://*.amazon.ca/*",
        "*://*.amazon.com.mx/*",
        "*://*.amazon.cn/*",
        "*://*.amazon.in/*",
        "*://*.amazon.co.jp/*",
        "*://*.amazon.sg/*",
        "*://*.amazon.ae/*",
        "*://*.amazon.sa/*",
        "*://*.amazon.fr/*",
        "*://*.amazon.de/*",
        "*://*.amazon.it/*",
        "*://*.amazon.nl/*",
        "*://*.amazon.pl/*",
        "*://*.amazon.es/*",
        "*://*.amazon.se/*",
        "*://*.amazon.com.tr/*",
        "*://*.amazon.com.au/*"
      ],
      "js": [
        "amazon.js"
      ]
    },
    {
      "matches": [
        "*://*.ebay.com/*",
        "*://*.ebay.co.uk/*",
        "*://*.ebay.com.au/*",
        "*://*.ebay.ca/*",
        "*://*.ebay.de/*",
        "*://*.ebay.fr/*",
        "*://*.ebay.it/*",
        "*://*.ebay.es/*",
        "*://*.ebay.ie/*",
        "*://*.ebay.de/*",
        "*://*.ebay.at/*",
        "*://*.ebay.ch/*"
      ],
      "js": [
        "ebay.js"
      ]
    }
  ]
}