GNOME Shell extensions allow customizing the default GNOME Shell interface and its parts, such as window management and application launching.
Each GNOME Shell extension is identified by a unique identifier, the uuid. The uuid is also used for the name of the directory where an extension is installed. You can either install the extension per-user in ~/.local/share/gnome-shell/extensions/<uuid>, or machine-wide in /usr/share/gnome-shell/extensions/<uuid>.
To view installed extensions, you can use Looking Glass, GNOME Shell’s integrated debugger and inspector tool.
Press Alt+F2, type in lg and press Enter to open Looking Glass.
On the top bar of Looking Glass, click Extensions to open the list of installed extensions.
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