This time, it's not Andreessen's former company, Netscape Communications, that's taking on Microsoft's Internet Explorer. It's the increasingly popular smaller products such as Apple Computer's Safari and the open-source, Andreessen said.
"It may turn out that there's a one-two punch with Firefox and Safari," Andreessen said Wednesday at the Web 2.0 conference here. "Microsoft is certainly going to respond competitively."
Firefox owes more than a debt of gratitude to Netscape. The company created and funded the open-source Mozilla project that created it, although Mozilla was later spun off as an independent group.
Claiming browsersince 1998, Andreessen said the recent emergence of competitive software will force Microsoft to pay more attention to developing .
Andreessen said he doesn't expect Microsoft to change its way of doing things should it detect a threat from Safari and Firefox.
"If I were (Microsoft) I'd take another look, and I would see how I could screw with other people's businesses with this monopoly (I) have," he said.