QQ Browser  

1. 1. Click on the browser settings burger icon in the top right corner of the screen

   
2. 2. In the menu that opens, select the option 设置.
3. 3. In the left-hand menu, select 隐私和安全.

1. 4. In the opened tab, click on the section 清除浏览数据. 
2. In the new window that appears, check the checkbox Cookie 及其他网站数据 and click the button 清除数据.