How can I block this site
How can I block this site and other political sites that open in Firefox in it's own window? It is usually hidden behind my main Firefox window
Opaite Mbohovái (3)
Try use addons:
You may have ad-ware on your system.
Further information can be found in the Troubleshoot Firefox issues caused by malware article.
Adblock Plus {web link} Blocks annoying video ads on YouTube, Facebook ads, banners and much more. Adblock Plus blocks all annoying ads, and supports websites by not blocking unobtrusive ads by default (configurable).
Hello, see also the next links, to block the sites in hosts files.
http://www.howtogeek.com/122404/how-to-block-websites-in-windows-8s-hosts-file/
http://www.wikihow.com/Block-a-Website-in-All-Web-Browsers
thank you