What is 'Browser integrity check'?

The 'Browser integrity check' feature looks for HTTP headers most commonly abused by spammers and blocks access to your domain. It also challenges visitors without a user agent or with a non-standard user agent such as abusive bots, crawlers, or visitors. 

You can find this feature in the 'Application layer' box, which is located in ‘CDN’ > 'Enhanced security' > 'DDoS protection'. 

The browser integrity check is enabled by default, however you can turn it on or off by toggling the switch. 

You can also change the settings from 'Standard' to 'Strict.'The only difference between 'Standard' and 'Strict' is, 'Strict' also blocks rogue web search engine crawlers.