Netscape Opens Its Source — mozilla.org Is Born

On 22 January 1998, a press release datelined Mountain View announced two things at once. Netscape Communications was making the current Navigator and Communicator Standard Edition 4.0 free immediately, and it would publish the source code of the next-generation Communicator 5.0, "beginning with the first Netscape Communicator 5.0 developer release, expected by the end of the first quarter of 1998." At the time, the move had no real precedent in the commercial software industry.

CEO Jim Barksdale put the reasoning on the record: "By giving away the source code for future versions, we can ignite the creative energies of the entire Net community and fuel unprecedented levels of innovation in the browser market." The same release put Netscape's client installed base at "more than 68 million" and said the licence would build "on the heritage of the GNU Public License (GPL)."

mozilla.org launched a month later, on 23 February. The code itself shipped on 31 March, under the Netscape Public License (NPL) 1.0, with the Mozilla Public License (MPL) 1.0—drafted by Netscape lawyer Mitchell Baker—alongside it for new files. The two-licence arrangement was the settlement of a community revolt over an NPL clause that let Netscape alone take the code proprietary again. The dinosaur-head logo was commissioned from the artist Shepard Fairey by Jamie Zawinski in March 1998; it would represent Mozilla for the next twenty years and more.

From that decision came the Mozilla Suite, Mozilla 1.0 (2002), Firefox 1.0 (2004), Thunderbird, and the present Mozilla Foundation / Corporation structure.

Why a Company Open-Sourced Its Crown Jewel

In 1995 and 1996 Netscape was ascendant: Navigator is generally reckoned to have held more than 90% of the browser market in the mid-1990s. The IPO of 9 August 1995 priced at $28, ran to $75 intraday and closed at $58.25—an emblematic event of the dot-com era.

Then in December 1995 Microsoft turned the whole company toward the internet. Internet Explorer 4.0 arrived in September 1997, 5.0 in March 1999, both bundled free with Windows. Netscape, which charged for its browser, was forced into a price war with a free product carried by the dominant operating system, and its revenue mix collapsed. The January 1998 release gives the numbers itself: standalone client software was about 45% of company revenue in Q4 1996 and roughly 13% by Q4 1997.

The groundwork for the decision was laid by Frank Hecker, a technical manager in Netscape's government sales group, in a paper dated 11 November 1997 and titled "Netscape Source Code as Netscape Product". Hecker sent it to Marc Andreessen, who circulated it to senior management. Its argument was simple: Netscape could never match Microsoft's headcount, so it had to make outside developers part of the product.

The Influence of "The Cathedral and the Bazaar"

Eric S. Raymond's essay "The Cathedral and the Bazaar", first presented officially at the Linux Kongress in Würzburg on 21 May 1997, is widely credited with informing the decision.

The thesis:

• Cathedral model: a small group of experts builds in a closed environment, on a plan (the classical commercial model)
• Bazaar model: many participants build in parallel, in the open (the Linux model)
• "Given enough eyeballs, all bugs are shallow"

The order of events is easy to get wrong, so it is worth stating plainly: Raymond did not know. "I had had no clue this was going to happen before the day of the announcement," he wrote in the essay's epilogue. The mail that arrived afterwards came from Eric Hahn, Netscape's executive vice president and chief technology officer: "On behalf of everyone at Netscape, I want to thank you for helping us get to this point in the first place. Your thinking and writings were fundamental inspirations to our decision." Raymond flew to Silicon Valley at Netscape's invitation the following week—4 February 1998—for a day-long session at which, in his account, the source-release strategy and licence were designed together.

Raymond's essay would become a 1999 book and a kind of philosophical bible for the open-source movement; Netscape's decision was the moment its thesis received executive validation in industry.

From Mozilla Suite to Firefox

The released Communicator source proved harder to work with than expected:

• A codebase with the parts that could not be released (Java, cryptography) cut out of it
• A build that required a licence for the proprietary Motif library—Raymond later named this as a breach of the bazaar's basic rule, that a project must ship something a would-be contributor can run and see working
• A layout engine at the end of its life

On 26 and 28 October 1998, mozilla.org posted revised roadmaps announcing a full rewrite of the old Communicator code and a move to the new rendering engine known internally as NGLayout and publicly as Gecko; a preview followed on 7 December. Mozilla 1.0 did not ship until 5 June 2002—four years and two months after the source release. Raymond's verdict was blunt: "the Mozilla group didn't ship a production-quality browser for two and a half years after the project launch." In 1999 one of the project's principals, Jamie Zawinski, resigned complaining of poor management, with the observation that open source "is not magic pixie dust."

But Mozilla Suite was monolithic and heavy. Dave Hyatt and Blake Ross started a lightweight browser-only project, Phoenix, whose 0.1 release came on 23 September 2002. A trademark claim from Phoenix Technologies forced a rename to Firebird; an objection from the Firebird database project forced another, to Firefox, on 9 February 2004. Firefox 1.0 shipped on 9 November 2004.

Firefox pried open the IE monoculture, reaching a peak usage share of 32.21% in November 2009 on StatCounter's numbers. Tabbed browsing, extensions, web-standards compliance—the modern browser idioms it consolidated were later inherited by Chrome.

The Foundation / Corporation Structure

In July 2003 AOL (Netscape's parent) dissolved the Netscape division. To continue mozilla.org's work, the Mozilla Foundation was incorporated as a US 501(c)(3) non-profit.

A Foundation alone, however, could not easily handle commercial agreements—especially the default-search-engine deal that funded the work. So in August 2005, the Mozilla Corporation was created as a wholly-owned for-profit subsidiary:

• Mozilla Foundation (non-profit) — holds all shares; guards mission and governance
• Mozilla Corporation (for-profit) — develops and operates Firefox; signs deals with Google and others

The "non-profit parent + for-profit subsidiary" structure had almost no precedent in 2005. Similar arrangements appeared later in AI—OpenAI placed a for-profit entity under its non-profit in 2019—but no source establishes Mozilla as the direct template, and it is recorded here only as the earlier instance.

The Mozilla Public License

The MPL 1.0 (1998), drafted by Netscape lawyer Mitchell Baker, aimed at a middle path between GPL and BSD:

• File-level copyleft: only modified files fall under the MPL, not the whole derivative work
• Sources of modified files must be made available, but those files may be linked into a larger, possibly closed, product

MPL 2.0 (published 3 January 2012) made the licence usable alongside the GPL, LGPL, and AGPL, ending the incompatibility. It is used well beyond Mozilla's own Firefox and Thunderbird—LibreOffice, Brave, and RabbitMQ among others.

A Counterweight to Single-Vendor Lock-In

Mozilla 1998 was not, by itself, a commercial success. AOL agreed to buy Netscape on 24 November 1998 in a stock deal then valued at US$4.2 billion; by the time it closed on 17 March 1999, AOL's rising share price had made it worth roughly US$10 billion. AOL cancelled Netscape Navigator's development on 28 December 2007 and ended support on 1 March 2008.

The long-term consequences of the decision were of a different scale.

• It set the precedent for corporately-released open-source projects, alongside Apache and Linux.
• The Mozilla Foundation structure was an early instance of a non-profit wholly owning a for-profit operating company.
• Firefox served as the guardian of web standards from 2004 until the rise of Chrome in 2008 and beyond.
• The lineage of liberally licensed rendering engines—WebKit, Chromium, Servo (Rust)—runs through the work done at mozilla.org.

A bet taken from a cornered position turned out to be an institutional defence of the web against single-vendor lock-in. The founding of mozilla.org is the point at which open source matured from a movement of ideas into a counterweight against multinational platform power.