Question
This picked off one of the sites today, seems to go back a few weeks.
http://news.com.com/Mozilla+backtrac...3-5463442.html
Answer
Mozilla and Firefox allow third party extensions to be added to the browsers.
Some are very useful. Some are useless fluff. Some don't function right or have other quirks.
These browsers are great, and very much more secure than Explorer in use.
As with any kind of third party add-on to any program, be careful in your choices.