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The article aims to be an unbiased historial record for the usage share of web browsers (but ideally layout engines, as it is what matters), based on statistics and articles published by well-known websites. One of the use of such statistics is to create a graph that roughly represents the browser wars. This also serves as a reference for the various web browser articles.
This article is not all-inclusive or necessarily up-to-date.
2001 and earlier
AdKnowledge
| Date | Internet Explorer | Netscape Navigator |
|---|---|---|
| January 1998 | 36% | 61% |
| March 1998 | 42% | 57% |
| June 1998 | 46% | 52% |
Source: Behind the numbers: Browser market share
International Data Corporation
| Date | Internet Explorer | Netscape Navigator |
|---|---|---|
| January 1997 | 21% | 61% |
| January 1998 | 39% | 57% |
Source: Behind the numbers: Browser market share
ZD Market Intelligence
| Date | Internet Explorer | Netscape Navigator |
|---|---|---|
| January 1997 | 21% | 63% |
| January 1998 | 39% | 54% |
Source: Behind the numbers: Browser market share
Zona Research
| Date | Internet Explorer | Netscape Navigator |
|---|---|---|
| January 1997 | 28% | 70% |
| September 1998 | 36% | 62% |
| July 1999 | 45% | 54% |
Source: Behind the numbers: Browser market share
2002 to present
OneStat.com
| Date | Internet Explorer | Mozilla | Safari | Netscape | Opera | Source |
|---|---|---|---|---|---|---|
| 2002-04-29 | 97% | 2.8% | 0.5% | 2002-04-29 | ||
| 2002-07-21 | 95% | 0.4% | 3.4% | 0.7% | 2002-07-21 | |
| 2002-09-30 | 95% | 0.8% | 3.0% | 0.9% | 2002-09-30 | |
| 2002-12-16 | 95% | 1.1% | 3.0% | 2002-12-16 | ||
| 2003-02-03 | 95% | 1.2% | 0.11% | 2.9% | 2003-02-03 | |
| 2003-07-28 | 95% | 1.6% | 0.25% | 2.5% | 2003-07-28 | |
| 2004-01-19 | 95% | 1.8 | 0.48 | 0.8% | 2004-01-19 | |
| 2004-05-28 | 94% | 2.1% | 0.71% | 1.02% | 2004-05-28 | |
| 2004-11-22 | 89% | 7.35% | 0.91% | 1.33% | 2004-11-22 | |
| 2005-02-28 | 87.28% | 8.45% | 1.21% | 1.11% | 1.09% | 2005-02-28 |
| 2005-04-27 | 86.63% | 8.69% | 1.26% | 1.08% | 1.03% | 2005-04-27 |
WebSideStory.com
| Date | Internet Explorer | Mozilla Firefox | Mozilla |
|---|---|---|---|
| 2004-06-04 | 95.48% | 3.53% | |
| 2004-11-05 | 92.89% | 3.03% | 5.98% |
| 2004-12-03 | 91.80% | 4.06% | 6.89% |
| 2005-01-14 | 90.28% | 4.95% | 7.59% |
| 2005-02-18 | 89.85% | 5.69% | 8.16% |
| 2005-04-29 | 88.86% | 6.75% | 8.98% |
Source: WebSideStory Data Spotlight: 05-10-2005
Janco Associates Inc.
| Date | Internet Explorer | Mozilla Firefox | Mozilla | Netscape | AOL | MSN Explorer | Opera |
|---|---|---|---|---|---|---|---|
| January 2005 | 84.85% | 4.23% | 4.48% | 3.03% | 2.20% | 0.58% | 0.34% |
| April 2005 | 83.07% | 10.25% | 3.81% | 0.92% | 0.85% | 0.67% | 0.41% |
Source: Janco Associates Inc.