As Firefox becomes more popular, Microsoft has to respond in an effort to slow their market share loss to Firefox (see my previous blog entry about Firefox nearing 10% market share). In IE7, being shown this week at CES, Microsoft has implemented a few of the features that make Firefox so popular (tabbed browsing, RSS button, etc.) While it is great to see Microsoft adding additional features to IE, it is interesting to note that Firefox is innovating ahead of Microsoft in this area. In this case the propriety, corporate application is following in the footsteps of the open source community. Now, if Microsoft could only cultivate an open community of people dedicated to writing Firefox style extensions for IE …