The internet browser market has been very busy in the last year in terms of new versions and adoption of new browser platforms. 

 
      
  • Internet Explorer 9 is currently in Release Candidate
  •    
  • Firefox 4.0 is currently in Beta
 

You can view usage statistics for last month, but also over time here - http://en.wikipedia.org/wiki/Comparison_of_web_browsers

 

With each release we evaluate usage statistics available on the web, but also looking at data from thwack.com and solarwinds.com.

 

As we are in planning stage for the next NPM release, when we release this version (meaning later this year), we will be formally dropping support for Internet Explorer 6.