Ubuntu 上使用Extension Manager 安装插件，但目前无法在Extension Manager 中卸载。
卸载方式可以通过 gnome-extensions 命令进行卸载：
Usage:gnome-extensions COMMAND [ARGS…]Commands:help Print helpversion Print versionenable Enable extensiondisable Disable extensionreset Reset extensionuninstall Uninstall extensionlist List extensionsinfo Show extension infoshow Show extension infoprefs Open extension preferencescreate Create extensionpack Package extensioninstall Install extension bundle
示例：
zhaoc@zhaoc:/$ gnome-extensions list
user-theme@gnome-shell-extensions.gcampax.github.com
dock-unroll@fthx
ding@rastersoft.com
tiling-assistant@ubuntu.com
ubuntu-appindicators@ubuntu.com
ubuntu-dock@ubuntu.com
zhaoc@zhaoc:/$ gnome-extensions uninstall dock-unroll@fthx
