Before people start talking about CCleaner's slow/lazy start, I am posting a solution, which includes adding the following lines to hosts file: 

0.0.0.0 ncc.avast.com
0.0.0.0 ncc.avast.com.edgesuite.net
0.0.0.0 ipm-provider.ff.avast.com
0.0.0.0 shepherd.ff.avast.com
0.0.0.0 ip-info.ff.avast.com
0.0.0.0 analytics.ff.avast.com
127.0.0.1 ncc.avast.com
127.0.0.1 ncc.avast.com.edgesuite.net
127.0.0.1 ipm-provider.ff.avast.com
127.0.0.1 shepherd.ff.avast.com
127.0.0.1 ip-info.ff.avast.com
127.0.0.1 analytics.ff.avast.com 