opsite.biz Email Addresses and Contacts - KazanSEO

Based on the provided text, it is difficult to determine the exact subject or purpose of the website. The text seems to contain a collection of JavaScript functions and code snippets related to performance measurement, window configurations, error handling, and browser compatibility detection. It may be related to web development or coding techniques for optimizing website performance. However, without further information or context from other portions of the website's content, it is not possible to provide a comprehensive summary of what the site is about.