Internet Explorer, still the most popular web-browser today, has long been derided for its susceptibility to security exploits. Along came Firefox to challenge the dominant Windows browser, promising a more secure environment. Both browsers have now been revamping, issuing new versions and making sure to let end users know that security and privacy are top of mind in the development process. Because IE is part of the Windows operating system those running Windows must keep Internet Explorer up-to-date and patched – even if it is not their primary browser. And, just because they do not seem susceptible to the high number of security holes, Firefox, Safari, Opera, Chrome and others must kept patched and up-to-date. What’s more, when was the last time you updated your various browser plugins, add-ons and co-dependent applications?

According to PC Mag's Security Watch end users do not keep add-ins up to date. For instance, Adobe Systems browser add-in Flash, that plays video and other types of multimedia, has been exploited several times. Adobe's free and widely available Reader application, which is called up by browsers to read PDF files, is constantly being updated with security patches. Other software that is called by the browser, like QuickTime, RealPlayer and Windows Media Player must also be kept up to date. Also, keep in mind other plugins and addons, as these may put an otherwise secure browser at risk. Remember to only download applications and applets from reliable sources (preferably the vendor) and turn on automatic notification of updates if available.