DOU enhancer is a Chrome extension developed by Gennady Dogaev that enhances the user interface of the popular website dou.ua. This extension adds a WYSIWYG editor and other useful features to improve the user experience.

The core features of DOU enhancer include the addition of a WYSIWYG editor, which is configured to work only with accepted tags using the TinyMCE editor. This allows users to easily format their comments without needing to know HTML or other coding languages. Additionally, the extension adds syntax highlighting for code, which can be added using the WYSIWYG editor for correct highlighting.

Another useful feature of DOU enhancer is the addition of previews for images and YouTube videos in user comments. If a comment contains a link to a jpg, png, or gif image, the image will be added to the end of the comment as a preview. Similarly, if a comment contains a link to a YouTube video, a preview of the video will be displayed.

Users have the ability to control the size of the media previews or disable them completely, providing flexibility based on their preferences. Additionally, DOU enhancer expands all threads by default, making it easier to navigate and read through discussions on dou.ua.

Lastly, the extension replaces utf-8 emoji with twemoji, enhancing the visual appearance of comments and adding a touch of personality.

DOU enhancer is a free Chrome extension that falls under the category of Browsers and the subcategory of Add-ons & Tools. It offers a range of features that enhance the UI of dou.ua, making it a valuable tool for users who frequently visit the site.