What about extensions that I've had installed for a long time, installed from the webstore but have since been removed or updated to versions I don't want? It'

What about extensions that I've had installed for a long time, installed from the webstore but have since been removed or updated to versions I don't want? It's not about not knowing how to switch to developer mode, it's about the fact that everywhere is putting up higher and higher walled gardens. Sure, it makes sense for most people, but it's not the direction I like to see the internet go in.