OnTab is a Chrome add-on designed to streamline your browsing experience by providing instant definitions and summaries. By simply highlighting any text, users can access a popover that offers options to define or summarize the selected content. This tool is powered by Gemini, ensuring that information is delivered quickly and efficiently without the need to switch tabs, thus maintaining workflow continuity.

The main features of OnTab include instant definitions for quick clarity, concise summaries that allow users to grasp lengthy texts rapidly, and an easy on/off toggle to customize its functionality according to user preferences. This lightweight and user-friendly tool aims to enhance productivity and transform how users interact with online content.