Panda Cloud and Firefox search

I recently noticed that when I tried searching from Firefox's address bar, I would occasionally get a blank page with the text "No site configured at this address". Although performing the same search in Firefox's search bar worked fine. In my attempt to troubleshoot, I found that the problem seemed to only occur when I searched for a single word.

I had a suspicion that Panda Cloud was causing the problem however since I was using Firefox Portable and I didn't have any addons relating to Panda, I was doubtful. Nonetheless after uninstalling the url filtering portion of Panda, my searches were back to normal. Has anyone experienced anything similar? I find it a shame that I had to uninstall a portion of my antivirus.

 

I had similar problems and uninstalling url filtering solved it.

I really like the url filter and hope they can fix these bugs in it.

 

Offtopic:
Is panda cloud blog site compromised? When I access it, IE11 warns me that the site is trying to run adobe reader plugin though there is no pdf opened. Also IE smart screen filter is blocking the offline installer for panda cloud.