遊戯王DBデッキサポート is a free Chrome add-on developed by TomoTomo. It enhances the deck editing experience on the official card database by adding MouseUI mode and several additional buttons, including Export, Import, Sort, and Shuffle.

With this add-on, users can switch between a text-based interface and a mouse-centric UI (MouseUI) for deck editing, similar to the Master Duel game. Moving cards within the deck is as simple as clicking the mouse. The left-click allows users to move cards from the Main/Extra deck to the Side deck, the wheel-click adds cards from the Main/Extra deck to the Main/Extra deck, and the right-click removes cards and moves them to the Temp area.

The add-on also provides useful features such as exporting the deck as a file or text containing the ID or name of each card, sorting and saving the deck recipe, and shuffling the displayed deck recipe. Importing a deck can be done by selecting a file.

To report any issues or provide feedback, users can fill out a Google Form or contact the developer on Twitter.

Note: The add-on automatically updates the database every three days, but manual updates can also be performed through the extension's options page.