Absolutely agree with this. The first time I installed the uMatrix extension, half the sites were broken because they wouldn't load unless I greenlighted access

Absolutely agree with this. The first time I installed the uMatrix extension, half the sites were broken because they wouldn't load unless I greenlighted access to all the third-party servers. Only 30% of the sites I've come across didn't need tinkering with uMatrix to work. PS: uMatrix disables loading of resources (IFrames, scripts, etc.) if it's not served by the first-party (i.e. The domain itself) domain by default.