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JavaScript is a lightweight, object-oriented, cross-platform scripting language, often used within web pages.

jQuery is a JavaScript library that simplifies HTML document traversing, event handling, animating and Ajax interaction. Originally developed by John Resig.

Bootstrap is an open source HTML, CSS, and JavaScript framework.

Mustache.js is a JavaScript implementation of the mustache template engine.

Bootstrap is an open source HTML, CSS, and JavaScript framework.

Nginx (pronounced as "engine X") is a lightweight open source web server developed by Igor Sysoev.

NetAngels is a Russian web hosting provider.

NetAngels is a Russian web hosting provider.

NetAngels is a Russian web hosting provider.

Gmail is the email service provided by Google.

Let’s Encrypt is a free, automated, and open certificate authority provided by the Internet Security Research Group.

Yandex Libraries Hosting provides hosted JavaScript libraries, provided by Yandex.

Yandex.Metrica is a free web analytics system combining customizable reporting tools with behavioral analytics.

Top.Mail.Ru is a Russian web access counter service.

The Google Advertising network consists of AdSense, DoubleClick and other services.

AdFox is a Russian advertising network owned by Yandex.

The Google Tag Manager is a Google service to support webmasters to manage tags on their websites.

The WhatsApp share button allows users to share content with their WhatsApp contacts.

External Cascading Style Sheets define style rules in a separate CSS file.

Inline Cascading Style Sheets define style rules directly within an (X)HTML element using the style attribute.

Session cookies are temporary cookies, which are deleted when the user closes the browser.

Persistent cookies with an expiration time of up to 1 day.

Persistent cookies with an expiration time between 1 day and 1 month.

Persistent cookies with an expiration time between 1 month and 1 year.

HttpOnly cookies are used only in the HTTP protocol and not in client side scripts, which may increase security.

Non-HttpOnly cookies are used in the HTTP protocol and also in client side scripts, which may be a security threat.

Non-secure cookies may be used via an unencrypted connections, which may be a security threat.

Gzip (GNU zip) is a file compression algorithm.

HTTP Strict Transport Security (HSTS) defines a mechanism enabling web sites to declare themselves accessible only via secure connections.

The websites redirects visitors to use SSL encryption, e.g. from http://example.com/ to https://example.com/.

HTTP/2 is the second major version of the HTTP network protocol.

The Open Graph protocol, originally developed by Facebook, is an RDFa-based format that enables any web page to become a rich object in a social graph.

HTML5 is the fifth revision of the HTML standard.

UTF-8 (8-bit Unicode Transformation Format) is a variable-length character encoding for Unicode, which is backwards compatible with ASCII.

PNG (Portable Network Graphics) is a lossless compression image format, suitable to store graphics with uniformly colored areas, and originally introduced as a free, open-source successor of GIF.

JPEG (Joint Photographic Experts Group) is a lossy compression method suitable to store photographic images.

Scalable Vector Graphics (SVG) is an XML-based vector image format.

WebP is an image format that provides lossless and lossy compression, developed by Google.

GIF (Graphics Interchange Format) is a lossless compression image format, originally introduced by CompuServe and suitable to store graphics, logos and simple animations.

AVIF (AV1 Image File Format) is an image file format specification for storing images or image sequences compressed with AV1 in the HEIF file format.

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