Hello!

Is Kaspersky original? Also I have carried out installation not for long but not reply problems.

Bye

Yes it is original. I just purchased it from Amazon.

Graces for the comment. You are helping to improve Firefox. Make to know here us also: http://mzl.la/1fgBjW6

I am new to this. Your first answer didn't solve my problem. I hope Mozilla will provide a solution. Thank you for your replies.

First off the URL advisor isn't a necessary part of Kapersky's security. Your anti-virus is still running in the background. It mimics features already in Firefox. There is no real reason to use it and it can introduce stability issues that wouldn't exist otherwise.

If you still want it, please contact Kapersky for assistance, maybe they have a newer version that is compatible with Firefox.