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

This works as advertised. You know how great a complement this statement is in these dark times!

I have two suggestions:

1. As practically all other folks here are demanding, the sidebar must be wider. If this is because Side View uses the built-in side view pane in Firefox, please, if at all possible, implement your own side pane and make it wider.
In case that's possible, why not more than one side panes simutaneously? Keeping two sidebars at each side would be very nice.

2. The Side View icon on the quick menu that appears at the top right corner by default. Currently its only real function is to switch between mobile/desktop view.
Please add that command in the context menus. Currently it has only one item (Open in sidebar), please change it to something like 'Open as Desktop/Mobile Site in sidebar' - so that if you click an empty space or tab, you could also choose how it will load. Then we could unclutter the quick toolbar if we choose to without sacrifice. Keeping track of sidebar-only visit history can be nice to some people, but I find it not very crucial.