This extension adds a switch to enable or disable the desktop icons. This is also possible via gnome-tweak-tool, but this is for faster access to turn the icons on and off...
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This is going to break if you use g-tweak-tool at the same time, and anyway the utility seems questionable at least. Not a good reason to reject...
yes, changing the icons via tweak will not update the status in this switch, but it should not break. the extension is for people, who have a desktop-icon-chaos (like me) to switch on/off with one click in the panel...