Yes. As browsers have become a critical component of every enterprise infrastructure, Gartner Research* has advised against enterprises standardizing on a single browser. This recommendation was first delivered in 1997 and continues today as web-based business applications become more and more pervasive, whether hosted internally or delivered via global SaaS providers. In addition, Gartner long ago outlined the tradeoffs between manageability and agility, along with the serious security implications of a single browser strategy in the enterprise.
* Source: Gartner Report “Organizations Should Still Say No to Standardizing on One Browser” Published 26 February 2010.