Examine source code of Kitspace 1-click BOM

{
  "manifest_version": 2,
  "name": "Kitspace 1-click BOM",
  "description": "Quickly fill shopping carts with electronic components.",
  "homepage_url": "http://1clickBOM.com",
  "version": "1.8.8",
  "permissions": [
    "tabs",
    "clipboardRead",
    "clipboardWrite",
    "storage",
    "notifications",
    "webRequest",
    "webRequestBlocking",
    "<all_urls>",
    "cookies",
    "http://localhost/"
  ],
  "browser_action": {
    "default_icon": "images/button19.png",
    "default_popup": "html/popup.html"
  },
  "background": {
    "persistent": true,
    "page": "html/background.html"
  },
  "options_ui": {
    "page": "html/options.html",
    "open_in_tab": true,
    "browser_style": true
  },
  "icons": {
    "16": "images/logo16.png",
    "19": "images/button19.png",
    "38": "images/logo38.png",
    "48": "images/logo48.png"
  },
  "content_scripts": [
    {
      "matches": [
        "*://kitspace.org/*",
        "*://*.kitspace.org/*",
        "*://kitspace.dev/*",
        "*://*.kitspace.dev/*",
        "*://kitspace.test/*",
        "*://*.kitspace.test/*"
      ],
      "js": [
        "js/kitspace.js"
      ],
      "run_at": "document_end"
    }
  ],
  "browser_specific_settings": {
    "gecko": {
      "id": "1clickBOM@monostable"
    }
  }
}