try them out in Nightly Firefox Labs 131 – Firefox Nightly News

We’re excited to share that vertical tabs and a new sidebar experience are now available in Nightly 131. This update has been highly anticipated and requested by the community, and we’re excited to see how it improves your browsing and productivity. To give this in-progress work a try:

• update to the latest Nightly,
• go to Settings > Firefox Labs,
• activate Sidebar And Vertical tabs experiments,
• Click Customize toolbar in the right-click menu of the toolbar and drag the sidebar icon to your toolbar. Clicking on the sidebar icon will allow you to expand vertical tabs.

We designed the new sidebar and vertical tabs to smooth out two key browsing workflows: context switching and multitasking.

• The new sidebar lets you quickly access all your favorite tools, whether it’s tabs on your mobile phone, your favorite extension, or bookmarks with your main task.
• Vertical tabs make it easier to scan information and switch between tasks.

This work is still very much in development. You’ll see us refining things over the coming months, and we’d love your feedback to help bring these features to life.

We’ll also share with you our backlog of improvements to Mozilla Connect so you can get an idea of ​​where we ultimately want these features to go.

What’s next?

We’re calling on our community to test the new sidebar and vertical tabs experience, and your constructive feedback is crucial as we refine these features. Share your thoughts on Mozilla Connect – we’ll take your input into account and it’ll help us create a browsing experience that meets your needs. 🦊.

If you are a web extension developer and your extension uses sidebar APIs or works with tabs, we would love it if you tested it with the new sidebar and vertical tabs enabled. While there are no changes to Web Extension APIs associated with these features, this is a good opportunity to anticipate any unforeseen issues that may arise from the updated UI.