[11][9] The browser by default renders the webpage using the WebKit-based engine adapted for Google Chrome, Blink, and when running in compatibility mode, it renders webpages using the Trident engine found in Internet Explorer.

[12][13] Webkit-based engine was introduced in 2010 (dual-engine with Trident),[14][15] as the 360 Extreme Browser (Chinese: 360极速浏览器).

As of 2017[update], the latest versions of 360 Secure Browser do not offer a distinguishable user-agent string.

It spoofs itself either as Google Chrome or Internet Explorer, making it difficult for developers to target or identify.

"[21] This and other controversies surrounding Qihoo eventually led to the temporary pulling of their products from the iOS App Store.