Examine source code of Splunk Log Formatter

{
  "manifest_version": 2,
  "name": "Splunk Log Formatter",
  "version": "1.0.0",
  "description": "Format Splunk logs into table + JSON viewer",
  "browser_specific_settings": {
    "gecko": {
      "id": "locpt@ocb.com.vn",
      "data_collection_permissions": {
        "required": [
          "none"
        ]
      }
    }
  },
  "permissions": [
    "contextMenus",
    "activeTab"
  ],
  "background": {
    "scripts": [
      "background.js"
    ]
  },
  "content_scripts": [
    {
      "matches": [
        "*://centrallog.ocb.vn/*"
      ],
      "js": [
        "content.js"
      ],
      "css": [
        "style.css"
      ]
    }
  ],
  "icons": {
    "48": "icons/OMNI_Icon.png"
  }
}