Add option to disable extension updates

I have an extension which works, when I install it directly from the GitHub sources, but is broken, when I install it from the GNOME extensions page. For some reason the version on GNOME extensions is newer than the one on GitHub.

Since extensions are automatically upgraded to the latest version on the GNOME extensions page, I always end up with a broken extension after a login.

It would be great, if there is an option to disable automatic extension updates. Either individually for each extension or globally for all.