I am sure this is not an Avast problem neither it is my browser issue as until yesterday everything was working well and fine. Without any reason the problem started. The only changes I did recently were with my browser. I updated my Firefox browser, updated to version 13.0. And let me tell you that even after I did the update everything was working fine. Currently the status is that whenever I try to open up any site I get a gray bar even with those reputed and genuine sites. Anyone else getting the same issue? Sharing resolved issue might be much useful.