Websites crashing after ios15 installed

Hello, and welcome to Apple Support Communities eileenfromcrozet,

It looks like you've been using the article About the security content of Safari 15 and have some questions about Safari. You've mentioned certain websites are crashing.

Let's see if the steps included in this guide help: If Safari on Mac doesn't open a webpage or isn’t working as expected. This gives you places to begin to narrow down what might be happening.  

Also, you'd want to see if you're using iCloud Private Relay: About iCloud Private Relay.  We're suggesting that you look this over because it's a newer feature.  Look over the section "If a website or network doesn’t work with Private Relay" as it will give you the steps needed in order to get the websites you use working once again. 

We hope this helps! 

eileenfromcrozet,

We appreciate the update.

We're glad your issue with Safari is resolved, and you used the Apple Support Communities for help!

Enjoy the rest of your day.