This add-on is awesome! Chrome/Opera/Brave/Edge cannot do this even if they wish. As of now - some of them allows sidebar, but just for viewing Bookmarks or displaying search-results.

Only Firefox can pull-up a website in a sidebar as of now. Please continue its development.

This feature is "one" more major reason to totally ignore other web browsers in my day-to-day work. I have always used Firefox and will continue supporting it. Thanks for the continued development of the Mozilla project. God bless. Cheers.

This extension is excellent. Helps a lot. I hope that Mozilla will resume its development.

Android 4.4? 🪟

I'm sure you need to add a panel on the side, like in Opera, Brave or Vivaldi, where you can save sites that you want to open on the side.

Una de las mejores extensiones para Firefox

Funciona como queria, obrigado.

Хорошо бы было если бы в открывающейся вкладке была строка, позволяющая открывать сайты напрямую, а не через журнал.

와, 진짜 최고입니다. 사이드 페이지에 열어놓은 탭을 다른 탭에서도 항상 볼 수 있는데 정말 유용하네요.

非常好用,希望能增加 同时滚动功能,add sync scroll

it is great extension. Can not find nothing like that in Chrome