When you take a look at Net Applications' web desktop browser market share reports over the long run two things stand out. One, there's the rise of Google's Chrome to second place, and two, Mozilla's Firefox's steep decline.
How bad is Firefox's fall? In June 2014, Firefox hit a new five-year low of 15.6 percent market share.
Back in October 2009, Firefox was on the rise and had reached 23.75 percent. Life was good. Since July 2012, the browser started trending downward. Indeed, since May 2013, with Firefox at 20.6%, the once popular browser hasn't risen above 20%.
Read more at: Firefox web browser popularity wanes | ZDNet