It's a blinking cursor that appears on every web pages in different sizes when I click anywhere on the web pages. Look at following pictures please: http://samansh.persiangig.com/2011/cursor4.jpg http://samansh.persiangig.com/2010/cursor.jpg http://samansh.persiangig.com/2010/cursor2.jpg http://samansh.persiangig.com/2010/cursor3.jpg I believe that it's been originated and are spread from Google's Keyboard Navigation feature. As you may know, if you are using Google's Instant Search feature, you can use the keyboard to navigate Google's search result page. I did turn off the Instant Search to disable Keyboard Navigation, but the blinking cursor is still blinking on every Google and non-Google web pages. Next as a standard troubleshooting procedures for strange behavior I cleared cache and cookies , but it didn't help. I was using Firefox 3.6, so I uninstalled 3.6 (kept my personal information) and installed the latest version (3.6.13), but it didn't fix the problem. I don't see that cursor in IE. How can I get rid of it? Thanks in advance.