Listen to Firefox WebExtension sidebar closing...

Configuring a sidebar_action to be only on for certain sites?...

Firefox SDK Add-on with a sidebar on both the right and left at the same time...

firefox sdk: how to use emit for sidebar outside widget...

Firefox Add-on SDK: communicating objects between a sidebar and the main script...

How can I prevent Firefox showing my extension's sidebar on startup?...

How to toggle sidebar in firefox...

Android sidebar...