We have developed the browser extension voice enhancement system (BEEVES), an extension for Mozilla’s Firefox browser which supports voice extension development along with a visual agent. Interviews with extension developers verified a need for a framework which implements and integrates speech-to-text and natural language understanding components. User research suggests the need for a seamless voice experience bringing the benefits of mobile browsing to desktop. What we’ve built on open source components is aligned with Mozilla’s mission to ensure a private and accessible internet for all, and has the potential for enhancing commercial platforms.