6. Security Firefox simply handles security differently from Internet Explorer. Where Internet Explorer uses security zones, which can sometimes be confused by malicious software, Firefox does not rely on zones. Also, Firefox doesn't use digital signatures, which are verifications programmers can purchase.

7. Problems and Concerns The efforts of hackers focusing on the upstart browser could cause security problems. The fact that Firefox is based on open source code also has implications. Another possible problem with Firefox is its ability to block advertisements on Web sites.