Examine source code of CloseBuy

{
  "manifest_version": 2,
  "name": "CloseBuy",
  "version": "0.3.2",
  "description": "Shopping small businesses, made simple. Easily browse unique products from independent businesses all over the U.S.",
  "short_name": "CloseBuy",
  "author": "CloseBuy",
  "icons": {
    "16": "assets/icons/favicon-16.png",
    "32": "assets/icons/favicon-32.png",
    "48": "assets/icons/favicon-48.png",
    "128": "assets/icons/favicon-128.png"
  },
  "permissions": [
    "activeTab",
    "storage",
    "webNavigation",
    "unlimitedStorage",
    "tabs",
    "http://*/*",
    "https://*/*"
  ],
  "content_security_policy": "script-src 'self' https://cdn.segment.com https://browser.sentry-cdn.com; object-src 'self';",
  "applications": {
    "gecko": {
      "id": "{98ddd6e4-2591-1047-897a-36a1db15479c}",
      "strict_min_version": "58.0"
    }
  },
  "browser_action": {
    "default_icon": {
      "16": "assets/icons/favicon-16.png",
      "32": "assets/icons/favicon-32.png",
      "48": "assets/icons/favicon-48.png",
      "128": "assets/icons/favicon-128.png"
    },
    "default_popup": "popup.html",
    "default_title": "CloseBuy",
    "browser_style": false
  },
  "options_ui": {
    "page": "options.html",
    "open_in_tab": true
  },
  "background": {
    "scripts": [
      "js/background.bundle.js"
    ]
  },
  "content_scripts": [
    {
      "run_at": "document_end",
      "matches": [
        "http://*.amazon.com/*",
        "https://*.amazon.com/*"
      ],
      "js": [
        "js/amazonContent.bundle.js"
      ]
    },
    {
      "run_at": "document_end",
      "matches": [
        "http://*/*",
        "https://*/*"
      ],
      "js": [
        "js/merchantContent.bundle.js"
      ]
    }
  ]
}