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Adobe (formerly Macromedia) Dreamweaver is a web design tool running on OS X and Windows.

Static websites don't use any server-side programming language for generating web pages, but deliver fixed content which is created manually or with an offline tool.

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

Prototype is a JavaScript framework originally developed by Sam Stephenson.

Script.aculo.us is a JavaScript library based on the Prototype JavaScript framework, originally developed by Thomas Fuchs.

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

Hostland is a Russian web hosting provider.

Hostland is a Russian web hosting provider.

Hostland is a Russian provider of internet services.

Mail.Ru is a Russian provider of internet services. This includes the VK brand.

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

The validity of the SSL certificate has expired.

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

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.

Gzip (GNU zip) is a file compression algorithm.

A weak ETag is an HTTP header field for validation of cached web pages, that indicates a semantically equivalent page in the cache.

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

Transitional version of HTML.

Windows-1251 is an 8-bit character encoding, designed to cover languages that use the Cyrillic alphabet.

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.

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

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