firefox is safer, it is not the target of so many hackers as Internet Explorer. I also like the tab browsing. If you want, you can set it up so when you close the browser, a window will show asking you if you want to erase everything for security reasons. In Internet Explorer you have to go to Internet Options and click of erase history and cookies. It is faster and more convenient in Firefox.

For another, the thousands of plugins for firefox, I dont think I could live without my plugins.