WebSideStory: "Firefox's Share of Browser Market Grows 34 Percent in One Month"
"Firefox has made significant gains and Microsoft’s Internet Explorer’s usage share continues to fall in the United States. Between Nov. 5 and Dec. 3, Internet Explorer’s share dropped 1.09 percentage points to 91.80 percent, according to WebSideStory. This compares with a 0.32 percentage point drop the previous month. Since June 4, 2004, when IE’s usage share first began to drop due to security concerns, IE has lost a total of 3.68 percentage points."
U.S. Browser Usage Share
|Non-Firefox Netscape and Mozilla browsers||2.83||2.95||3.05|
* WebSideStory did not track the Firefox browser separately until Oct. 2004. The June 4, 2004, figure includes all Netscape and Mozilla-based browsers, including Firefox