New Features in Ver 2.2
・Features
・Icon
When clicking the icon, the sidebar can reload the displaying page even if it was opened from the context menu.
・Tab
Selected tab and current page can be opened in the sidebar now.
https://addons.mozilla.org/en-US/firefox/addon/open_in_sidebar/
https://github.com/Soushi-Atsumi/Open-in-Sidebar