Examine source code of 100prices

{
  "manifest_version": 2,
  "name": "100prices",
  "version": "0.0.0.6",
  "description": "Ahorra tiempo y mejora tu margen comercial, simplificando las búsquedas de los recambios que NO tienes en tú almacén",
  "icons": {
    "48": "icons/border-48.png"
  },
  "permissions": [
    "tabs",
    "storage"
  ],
  "background": {
    "scripts": [
      "background.js"
    ]
  },
  "browser_action": {
    "default_icon": "icons/border-48.png",
    "default_title": "100Prices",
    "default_popup": "popup/popup.html"
  },
  "content_scripts": [
    {
      "matches": [
        "*://*/*"
      ],
      "exclude_matches": [
        "*://mneo_searches.com/*",
        "*://search.factorydata.com/*",
        "*://100prices.com/*",
        "*://search.100prices.com/*"
      ],
      "js": [
        "100prices.js"
      ],
      "css": [
        "100prices.css"
      ]
    }
  ],
  "web_accessible_resources": [
    "images/100_logo.png",
    "images/display.png",
    "images/display_recover.png",
    "images/search_lupa.svg",
    "html/template.html"
  ],
  "browser_specific_settings": {
    "gecko": {
      "id": "{3c7df61d-b142-41ec-9326-b0377b886bf1}"
    }
  }
}