Google Chrome and Mozilla Firefox are the leading web browser. But both browsers have a drawback. With the time, speed of these browsers goes on decreasing and they start working slowly. This problem goes worst in case of Mozilla Firefox. I face browser speed issue in Firefox more than Google Chrome. The reason is fragmentation of profile databases. They also take time in startup and some time hangs up while browsing. Startup delay problem is common in Firefox browser and it is not in case of Google Chrome.
