Backup, reset, restore, configuration of a gnome extension.

Gnome-extension-configs.txt

How to export (backup), reset to defaults and import (restore) the configuration of a gnome extension.
// prints the whole config to a file
dconf dump /org/gnome/shell/extensions/<extension-name>/ > ~/<backupfile>
// Resets the config to defaults (might wanna check first if the dump was a succes by opening the file)
dconf reset -f /org/gnome/shell/extensions/<extension-name>/
// Loads configuration from a file into your gnome-shell
dconf load /org/gnome/shell/extensions/<extension-name>/ < ~/<backupfile>

From what I can tell a good way to determine <extension-name> is from its url at https://extensions.gnome.org
However its better to be safe and launch dconf editor , browse to /org/gnome/shell/extensions/ and check the name.

Output of a dump might look something like this (with more lines below it but no ending tag):
[/]
animation-time=0.10000000000000001
shortcuts-panel-show-running=true
dock-edge-visible=false
hide-delay=2.0

dconf dump /org/gnome/ > backup.txt is convenient for me!