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Mozilla Firefox is currently the #2 web browser. That position is now threatened by Google's Chrome, which is expected to overtake it in market share by the end of the year.
In 2012, Mozilla Firefox was mired with various critical bugs over iterative releases that caused the software to act sluggish.
Once hailed as a high-performance, bloatware-free browser alternative to Internet Explorer, it became the very thing it tried not to emulate, and even Microsoft proved that it could out-fox Firefox in terms of performance and memory utilization with IE 9 and also IE 10, which was released with Windows 8 and has been backported to Windows 7, with a pre-release due at the end of November.