Examine source code of I Hate Costpoint

{
  "description": "Helps create parts order lists from shopping carts when your purchasing rules force you to individually enter each item into Costpoint.",
  "manifest_version": 2,
  "name": "I Hate Costpoint",
  "version": "2.0",
  "homepage_url": "https://gitlab.com/jimfriel/cart_extractor",
  "icons": {
    "48": "icons/cart-48.png"
  },
  "content_scripts": [
    {
      "matches": [
        "*://*.digikey.com/*",
        "*://*.mcmaster.com/*",
        "*://*.thorlabs.com/*",
        "*://*.amazon.com/*",
        "*://*.mouser.com/*",
        "*://onequote.sunstone.com/*"
      ],
      "js": [
        "costpoint.js",
        "extractors/digikey.js",
        "extractors/mouser.js",
        "extractors/amazon.js",
        "extractors/sunstone.js",
        "extractors/thorlabs.js",
        "extractors/mcmaster.js",
        "extractors/thorlabsOld.js",
        "content-scripts/app-state.js",
        "content-scripts/storage.js",
        "content-scripts/costpoint-formatter.js",
        "content-scripts/ui.js",
        "content-scripts/cart-extractor.js"
      ]
    }
  ],
  "web_accessible_resources": [
    "images/*.gif"
  ],
  "permissions": [
    "storage"
  ],
  "browser_specific_settings": {
    "gecko": {
      "id": "{c4ce7799-f32f-4439-b738-ea86830a6f31}",
      "data_collection_permissions": {
        "required": [
          "none"
        ]
      }
    }
  }
}