Hi

If not only the browser freezes, but even the system itself, your computer may be infected by a virus or malware. To find out, you can use Malwarebytes Free.

Malwarebytes Free is an antivirus program capable of detecting and eliminating a large number of viruses, Trojans, rootkits, and spyware. Its use is very simple.

You can download Malwarebytes Free from the following link: 

https://en.alfanotv.com/apps/malwarebytes-free-for-windows/