A place to discuss the news and latest developments on the open-source browser Firefox
https://connect.mozilla.org/t5/discussions/firefox-sidebar-and-vertical-tabs-try-them-out-in-nightly/m-p/63231#M22243
This thread has some screenshots
https://connect.mozilla.org/t5/discussions/firefox-sidebar-and-vertical-tabs-try-them-out-in-nightly/m-p/63231#M22243
This thread has some screenshots