Side by Side is a Firefox add-on that allows users to work on two different websites within a single tab, enhancing multitasking efficiency. This tool does not open a new window, instead providing a unique split view of both sites side by side. Users can easily resize the split view and choose between horizontal or vertical orientations for optimal viewing. The add-on is designed for personalization, enabling users to adapt the theme based on their browser settings for a cohesive experience.

This subscription-based add-on focuses on user customization and convenience. Notably, the split view can be adjusted to fit various preferences, making it suitable for tasks that require simultaneous access to multiple web pages. With its adaptive theme feature, Side by Side seamlessly integrates with the overall look of Firefox, making it a practical addition for anyone looking to enhance their browsing capabilities.