Examine source code of Data Entry Assist

{
  "manifest_version": 2,
  "name": "Data Entry Assist",
  "version": "1.0",
  "description": "Adds a yellow border to  webpages",
  "permissions": [
    "storage",
    "<all_urls>",
    "webRequest",
    "webRequestBlocking"
  ],
  "icons": {
    "48": "icons/border-48.png"
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "dataentryassist@dua.com"
    }
  },
  "content_scripts": [
    {
      "matches": [
        "*://*.cloudtronnicsonline.com/*"
      ],
      "js": [
        "jquery.min.js",
        "assist.js"
      ]
    }
  ]
}