Testing our browser for any security loop hole is a good idea because most of the attacks to our computer came through the browser. If your browser shows frequent inconsistency you have to think about it. Most of these problems occur when people are start adding or removing different third party extensions, add-ons or toolbars to a browser. Even though some of these add-ons or extensions are having great helps to us, some add-on contains malicious code or it cause inconsistency to the browser.
If you suspect your browser for any problem, running a browser security check will do fine. Here is an online tool - Bcheck-that checks our browser for any security loop hole. It tests only Internet Explorer, Firefox and Opera and no support to Safari.
Via - Makeuseof