I'm running a couple of legacy extensions with irreplaceable functionality, so I ran the Safari 13.0.1 upgrade on a clone before inflicting it on my boot volume, because I feared that my extensions wouldn't work in the new version, and my fear was on target.

The only extensions that work in Safari 13.0.1 are those that are available from the App Store. frown mad

Yeah, I know it's all about security, but Apple's opinions should NOT be the last word, same as with SIP.

The new Great Equalizer is the SEND button.

In Memory of Harv: Those who can make you believe absurdities can make you commit atrocities. ~Voltaire