IE's market share continues to swindle... I mean dwindle. Its share of the browser market dropped by 1.8 percentage points over the past three months to 93.7 percent of the market. The drop is caused by its much-smaller competitors chiseling at its dominant position. Those competitors include the open-source browsers from the Mozilla Foundation and a commercial competitor from Opera Software ASA. Netscape/Mozilla browsers gained the most, rising 1.7 percentage points to 5.2 percent, while the category that includes Opera's browser rose 0.1 percentage points to 1.1 percent.
"We certainly encourage customers to examine all browser options, but we have not seen a significant shift in usage away from IE." - Microsoft
Mozilla are planning to promote their Firefox browser through use of their "Spread Firefox" campaign, and have set a goal of 1 million downloads of the Firefox preview within the first 10 days, along with the much larger goal of 10 million downloads within 100 days once the final Firefox 1.0 is released. The 1.0 release should happen later this year.