Marc Andreessen—Co-created Mosaic and Netscape browsers, pioneering the modern web and contributing to open source via Mozilla
Marc Andreessen co-authored NCSA Mosaic in 1993, the first widely used graphical web browser that made the internet accessible to non-technical users. He co-founded Netscape Communications in 1994, whose Navigator browser drove mainstream internet adoption. In 1998, Netscape released its browser source code as the Mozilla project, which eventually became Firefox. These contributions were foundational to the modern internet, democratized access to information, and made a significant contribution to open source software.
Scoring Impact
| Topic | Direction | Relevance | Contribution |
|---|---|---|---|
| Open Source | +toward | primary | +1.00 |
| Overall incident score = | +1.180 | ||
Score = avg(topic contributions) × significance (critical ×2) × confidence (0.59)
Evidence (1 signal)
Co-created Mosaic browser and co-founded Netscape, which released source code as Mozilla open source project
Marc Andreessen co-authored NCSA Mosaic (1993) and co-founded Netscape (1994), both foundational to the modern web. In March 1998, Netscape released its browser source code as the Mozilla project under an open source license, which eventually became Firefox. This was one of the most significant corporate open source contributions in history.