UserAgent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10_13_1) AppleWebKit/604.3.5 (KHTML, like Gecko) Version/11.0.1 Safari/604.3.5

Steps to reproduce the problem:
1. n/a
2. 
3. 

What is the expected behavior?
No mangled HTML in real-time like a Trojan horse is mucking with my browser.

What went wrong?
Not sure.

Did this work before? N/A 

Chrome version: 60.0.3112.101 (Official Build) (64-bit)  Channel: stable
OS Version: OS X 10.13.1
Flash Version: 

Please make this a high priority.  Make a security feature to prevent phishing and link replacement with malicious injections.