Examine source code of shoptimize

{
  "manifest_version": 2,
  "name": "shoptimize",
  "description": "shoptimize is a browser extension that instantly searches for products on Google Shopping, helping you find the best deals with just one click!",
  "version": "0.1.0",
  "icons": {
    "16": "icon/16.png",
    "32": "icon/32.png",
    "48": "icon/48.png",
    "128": "icon/128.png"
  },
  "web_accessible_resources": [
    "script-test.js"
  ],
  "browser_action": {
    "default_title": "Better price",
    "default_popup": "popup.html"
  },
  "content_scripts": [
    {
      "matches": [
        "<all_urls>"
      ],
      "exclude_matches": [
        "http://localhost/*"
      ],
      "run_at": "document_end",
      "js": [
        "content-scripts/content.js"
      ]
    }
  ],
  "browser_specific_settings": {
    "gecko": {
      "id": "{051ae80c-9c68-41f4-9eac-d3e940f85342}"
    }
  }
}