I open firefox. Go to website then where there is a + sign I open a new tab. A new tab comes up but then splits the screen into two with a new tab in the middle and I end up with 3 small split screens in the one instead of 3 separate tabs.because it is doing that i cannot then get a full screen and go about my usual business. Lately there seems to be numerous problems with fire fox loading also. it continues to come up with page not found and try again. I hit try again and then it may find the page. these are on sites that I access daily and have done so for several years now. Never before have I had so much trouble with fire fox. Not only I but we have four computers accessing the internet ...have done for some time and never had this problem but everyone is suddenly experiencing the same problem. The only thing new that has been put on the main computer is a K9 protection thing recently and I am wondering could that have anything to do with these issues and if not is fire fox having tech issues . How can these problems??