Once the custom browser is created, the Web application then will send it to the company along with a program for installing it across corporate desktops, Beltzner said.

Firefox also has a leg up on IE in corporations that have standardized on Apple computers, including many creative agencies and publishing houses, Rosoff said. "In a lot of cases they mandate Firefox use because it's cross-platform and [sites] render almost identically on PCs or Macs," he said.

Google's Chrome browser is another option for corporate users, although it is a relative newcomer even to consumers, having been released only late last year.

Still, Chrome has a lot of mind share due to the power of the company behind it, and Google, which has its eye on the enterprise for its Web-based applications, is keeping corporate users in mind with Chrome as well.

Google controls to its Google Update technology, which updates its applications -- including Chrome -- to allow companies to control policy via Windows Group Policy, according to a Google blog. This allows network administrators to apply policies to Chrome across all computers on a particular domain, and also gives users with administrative privileges the right to set the policy on individual machines.