More of a user question, I wanted to know where are stored Gnome Shell Extension parameters, I mean user-specific parameters for each extensions ?
To be more specific, here's an example: I installed Media Player Indicator on my former system and I took the time to come up with a nice Pango Markup script to display my music the way I wanted. I have a complete backup of my system on a hard drive and now I want to reuse this script in my new gnome shell. I copy-pasted the ~/.local/share/gnome-shell/extensions/mediaplayer@patapon.info folder to get the extension, but no parameters were kept, I believe those are not stored there.