The second feature is SIde View, which functions exactly as the name suggests: allowing you to view 2 browser tabs at the same time on the same tab and window. When you do not have this feature, you can put two windows side by side or use the second screen to view more pages at the same time. With Side View, using 1 screen will be more convenient.
Firefox suggests users can use Side View to compare news, buy online. This feature also remembers near-line comparisons and opens when needed.
Parallel view 2 tabs on one screen with Side View
Both of these features are being tested through Firefox's Test Pilot program, which you can download for free. This is where new features are tested before being uploaded to the browser, so it is not sure if Firefox Color and Side View will be put on the final product.
Firefox Test Pilot Program https://testpilot.firefox.com/
See more: