Extensions
Tool to enable / disable GNOME Shell extensions
GNOME Extensions handles updating extensions, configuring extension preferences and removing or disabling unwantedextensions.
This package contains a tool which users who use Shell extensions can use to toggle them on and off, and access their preferences.
How to install Extensions in Ubuntu
If you are on a supported distro, you can install the application through software center by clicking the below link.
If the above link not working, run the below command in terminal to install gnome-shell-extension-prefs in Ubuntu
sudo apt install gnome-shell-extension-prefs
Extensions Screenshots