BuildAndBrew.online Companion is a browser extension designed for the Chrome platform. Developed by RapidEDH, this free program falls under the category of Browsers with a subcategory of Add-ons & Tools.

The BuildAndBrew.online Companion serves as a deck-building companion for the 'BuildAndBrew.online' multiverse, providing a holistic solution for sorting newly discovered cards. Its main objective is to streamline the card search and aggregation process, giving deck builders more time to focus on brewing their decks.

With this browser extension, users can easily navigate through their favorite MTG-related sites and access all the necessary tools. It is an alpha version, so users may encounter some bugs or issues. However, the developers are open to feedback, bug reports, and feature requests to improve the extension further.