First the use ext button do not stay on.
Second every extension I try to install is now unsupported. Last time I was not using KDE and they worked but on this laptop I am using KDE and the ext manager is use less. Is it a bug or the ext manager just does not work for kde?
The Extensions and the Extension Manager apps are specifically for serving GNOME Extensions from here: https://extensions.gnome.org/
It will not do anything on KDE.
Thank you very much I managed to notice that then I changed my desktop to GNOME.