The Zona Research study, comprised of 308 companies, found that 59 percent of respondents use Microsoft's Internet Explorer as their browser of choice, while just 41 percent of respondents use Netscape's Navigator.
The results are in sharp contrast with Zona's October 1998 browser study findings, which showed Microsoft's IE trailing Netscape's browser by 20 percentage points, the firm said.
Zona said an increase in adoption of corporate browser policies is driving this shift toward IE.
When asked whether their companies encourage or require use of a particular browser, 69 percent of those surveyed said their companies had such policies. Of those respondents indicating their companies had browser policies, 62 percent revealed that Microsoft's Internet Explorer was standard, while 38 percent specified Netscape Navigator or Communicator.
"The fact that corporate policy dictates over two-thirds of all primary browsers in use reinforces the notion that the desktop browser has long ceased being a personal choice," Clay Ryder, vice president and chief analyst at Zona, said in a statement.