附加组件
要尝试这里成千上万的附加组件，下载 Mozilla Firefox，一个快速、自由的上网工具！
关闭
Flexible Sidebar 53.0
作者： Baris Derin
Flexible Sidebar allows to change sidebar width by dragging the handles.
![[警告]](https://addons.thunderbird.net/static/img/developers/test-warning.png?b=58a99cbb-667a0970)
权限
关于这个附加组件
Flexible Sidebar allows to change sidebar width by dragging the handles.
Click and drag right handle of the sidebar to adjust its width.
Click and drag right handle of the sidebar to adjust its width.
