I'm going to show you how to duplicate a browser tab that you are currently focused on into another tab in the same window.

Right Click

The first method is to just right-click on the tab that you want to be duplicated in another tab, I've tested this on a MacOS machine and it works on the following browsers:

• Edge
• Brave
• Chrome
• Safari
• Firefox Developer Edition

Keyboard Shortcut

Based on the official reference from some of the browsers below, there's no keyboard shortcut for Duplicate Tab on MacOS. But I found a hacky way to do this:

1. Make sure you're in the tab that you want to duplicate.
2. Press Cmd + L to focus and highlight the Address Bar.
3. Press Cmd + Return or Cmd + Enter to open the website in a new background tab.

In short:

1. Press and hold Cmd.
2. Press L.
3. Press Return or Enter.

Conclusion

In conclusion, duplicating a browser tab is very useful when developing a web application, but a keyboard shortcut is more conventional.

I hope this is useful for you, let me know if I missed something in the comments.

References

• Microsoft Edge Keyboard Shortcut
• Safari Keyboard Shortcut
• Mozilla Firefox Keyboard Shortcut
• Chrome Keyboard Shortcut
• Brave Keyboard Shortcut