The main features of グルドン拡張 include a permanent Mixlr player positioned in the lower left corner of the screen (version 0.1) and a display of the latest videos from the drikin YouTube channel also located in the lower left corner of the screen (version 0.3).

With the latest update (version 0.6), the extension now includes a minimization feature to prevent the input field from being hidden. Additionally, backspace.fm related links have been added. In version 0.5, the live streaming player has been changed from Mixlr to Twitch. Version 0.4 addressed a bug that prevented the control of the added YouTube and Mixlr players. Version 0.2 resolved an issue where the Mixlr player would duplicate in the advanced user interface. Finally, version 0.1 introduced the permanent placement of the Mixlr player in the lower left corner of the screen.

グルドン拡張 is a useful extension for グルドン users, offering convenient features to enhance their browsing experience. It is available for free on the Chrome platform.