(Tweak Tool showing list of installed Extensions on GNOME 3.32)
Instructions below showing both ways and you can follow either way you like. Happy tweaking!
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The problem
See you Tweak Tool on the Extensions section. If you find some to be ERROR, or you simply wish some to be removed, you cannot remove it. Some Extensions will eventually become ERROR when GNOME reached new version and you will need the developer to update the Extension to follow the new GNOME version.
(For example, MMOD Panel is not working on GNOME 3.32)
(For example, Gno-menu is not removable on the Software Center on Fedora Rawhide (30 beta) at the moment)
So, how to uninstall a GNOME Shell Extension?
Easiest but Long Way
It's strange but it's the fact, you can uninstall Extensions installed on your computer using a webpage on the internet. Go to https://extensions.gnome.org/local, or go to E.G.O. website and click 'Installed Extensions' link on top, you will see a list of all Extensions you have installed on your GNU/Linux system. Click the red X button to uninstall an Extension.
(Installed Extensions page on the E.G.O. website)
Easy enough but not fancy
With your File Manager, go to ~/.local/share/gnome-shell/extensions/ and carefully delete the folder of the Extension you meant to delete. For example, to remove AppIndicator Support, you delete the appindicatorsupport@rgcjonas.gmail.com folder below. If you do not see ~/.local folder, press Ctrl+H to show hidden files, press Ctrl+H again to hide them. See? It's not that hard at all.
(This is where your Extensions actually installed; they are installed as folders)
Check it out
Either way after you uninstalled the Extension, restart the Tweak Tool so you can be sure it is gone already. Enjoy tweaking!
(GNOME Tweaks, after some Extensions like MMOD removed)
This article is licensed under CC BY-SA 3.0.