Selectively blocking programs from opening web browsers or email programs

I’d like to be able to open any “About” window from any program and have all links disabled. What are the settings for that?

For each program you will need to add a rule to block http and email
This will also disable most internet access for the program
Or you can block http in some, email in some by changing the final “any” to “http ports” or “email ports”. About usually just uses “mailto” or “http” to perform these functions.