Brendan Eich

Brendan Eich (b. 4 July 1961) is the American programmer who, in 1995 at Netscape, prototyped JavaScript in about ten days under deadline pressure for the Netscape Navigator 2.0 beta. He went on to co-found Mozilla, serve as its CTO, and — briefly, for eleven days in 2014 — as CEO of the Mozilla Corporation before a controversy over a personal political donation ended the appointment. He co-founded Brave Software in 2015, building the privacy-oriented Brave browser and the Basic Attention Token (BAT), and remains its CEO.

Mathematics, computer science, then Illinois

Eich was born on 4 July 1961 and grew up in Pittsburgh, in Gaithersburg, Maryland, and in Palo Alto, where he graduated from Ellwood P. Cubberley High School in 1979. He read mathematics and computer science at Santa Clara University and took a master's degree at the University of Illinois Urbana-Champaign in 1985.

He began his career at Silicon Graphics, spending seven years on operating-system and network code, then moved in 1992 to MicroUnity, a company building data-streaming processors for audio and video. He joined Netscape Communications Corporation in April 1995.

He came to put Scheme in the browser

JavaScript (1995-)

Eich joined Netscape intending, in his words, to put Scheme "in the browser." Netscape's management had other requirements. In his own account of the period: "The diktat from upper engineering management was that the language must 'look like Java'." That ruled out Perl, Python, Tcl — and Scheme. What Eich built instead had much of the functionality of Scheme, the object model of Self, and the surface syntax of Java.

He completed a first working version in about ten days to fit the Navigator 2.0 beta schedule. The ten days refer to that prototype, not to the shipped language — the shipped language took much longer, and Eich also wrote the SpiderMonkey engine that ran it. Those ten days nevertheless bequeathed to the web platform first-class functions and closures, prototype-based object orientation, dynamic typing, and a famous catalogue of inadvertent traps: the dual existence of null and undefined, the difference between == and ===, and the historical bug that typeof null === "object".

The naming is routinely misexplained. The internal code name was Mocha; it reached the public as LiveScript in September 1995, and was renamed JavaScript in a joint Netscape–Sun announcement on 4 December 1995. This was not opportunistic branding by Netscape: it came out of Netscape's partnership with Sun, under which Sun trademarked "JavaScript" and licensed the mark back to Netscape. The link to Java is a commercial arrangement, not a technical one. The production Navigator 2.0, carrying JavaScript 1.0, shipped in March 1996. The full sequence is in the JavaScript article.

Standardisation began under Ecma International's TC39, producing the first edition of ECMA-262 — the ECMAScript standard — in June 1997. Eich has remained involved in the standard's evolution; he no longer represents Mozilla, having left the organisation in 2014.

Mozilla and Firefox (1998-2014)

In early 1998 Netscape opened its browser source code, and Eich co-founded the mozilla.org project with Jamie Zawinski and others; he served as Mozilla's chief architect. AOL bought Netscape in 1999 and shut the Netscape browser unit in July 2003, after which Eich helped spin out the Mozilla Foundation. In August 2005 he became chief technical officer of the newly created Mozilla Corporation.

Firefox — first as Phoenix, briefly Firebird, and from 2004 onwards Firefox — was the only effective rival to Microsoft Internet Explorer in the 2000s, peaking on StatCounter's measure at roughly 32 per cent of the global browser market in November 2009. Eich owned the SpiderMonkey module until he handed it to Dave Mandelin in 2011, spanning the generation of JIT compilers named TraceMonkey, JägerMonkey and IonMonkey.

Mozilla CEO and Resignation (2014)

On 24 March 2014 the board of the Mozilla Corporation appointed Eich CEO. Attention returned at once to a 2008 donation of $1,000 in support of California's Proposition 8, the state constitutional amendment prohibiting same-sex marriage, and to $2,100 given between 2008 and 2010 to Tom McClintock, a Proposition 8 supporter. The Proposition 8 donation had been a matter of public record since 2012. The dating site OkCupid displayed a message to Firefox users about it; CREDO Mobile gathered more than 50,000 signatures calling for his resignation; some Mozilla staff objected publicly.

He resigned eleven days into the role, on 3 April 2014, writing: "I have decided to resign as CEO effective April 3rd, and leave Mozilla. Our mission is bigger than any one of us, and under the present circumstances, I cannot be an effective leader." Mitchell Baker's statement for Mozilla the same day said: "Mozilla prides itself on being held to a different standard and, this past week, we didn't live up to it… We didn't move fast enough to engage with people once the controversy started. We're sorry. We must do better." The episode is still cited as a watershed in the longer Silicon Valley argument over the relation between an employee's private politics and their job.

Brave Software and Basic Attention Token (2015-)

Eich co-founded Brave Software with Brian Bondy, formerly of Mozilla, in 2015, raising $2.5 million in early angel funding. In January 2016 the company released developer versions of the Brave browser, a Chromium-based browser that blocks advertisements and trackers by default.

The Basic Attention Token (BAT), an ERC-20 token that Eich co-created, launched its initial coin offering on 31 May 2017 and raised $35 million — famously in around thirty seconds. The BAT proposition is a direct counter-design to the ad-tech market Google dominates: advertisers pay in BAT for user attention; users opt in to seeing chosen ads and receive a share of the payment directly.

Through 2024 and 2025 Brave rolled out Leo, an integrated AI assistant. In November 2025 Brave announced "verifiable privacy" for Leo: the models run inside NEAR AI's Nvidia-backed Trusted Execution Environments, so a user can cryptographically attest both that the conversation stayed private and that the intended model answered it. The feature entered Brave Nightly with DeepSeek V3.1 — confidential remote computing rather than local inference.

No prizes; the artefact is the record

No major academic award is recorded for Eich, and he has not received the ACM Turing Award. His standing rests on the artefact rather than on prizes.

Still Brave's CEO, in San Francisco

Eich continues as Brave Software's co-founder and CEO, based in San Francisco. The Brave Wallet supports Bitcoin, Ethereum, Solana and Avalanche among others, with Cardano added in 2025. Speaking at Blockworks' Permissionless IV conference in Brooklyn in June 2025 — onstage with the Midnight Foundation's Fahmi Syed, not in a keynote — he said: "We're kind of in [a] metaphysical rebellion against the big tech surveillance powers that evolved on JavaScript." He added that the cookie "wasn't for third-party tracking, but that's how it evolved, and JavaScript was just fuel on that fire," and argued that internet advertising is a "toxic system" which zero-knowledge proofs plus proof-of-humanity verification could replace. Brave's own transparency page, cited in the same report, gave 38.6 million daily and 88.1 million monthly active users.

He remains active on X as @BrendanEich, posting on cryptocurrency, libertarian politics and web standards.

He wrote JavaScript, and haste did not stop it

Eich's technical legacy is, in its way, very simple: he wrote JavaScript. And despite — or possibly because of — the haste of its initial design, JavaScript became the only truly universal client-side language on the web. With Node.js (2009) it took over the server too, and through React, Electron, and as the host environment for WebAssembly, the JavaScript / TypeScript presence is, as of 2026, still expanding.

The political legacy is more complicated. The 2014 resignation was the first prominent test in tech of how a company's culture should treat the private political convictions of its leadership. Eich's subsequent pivot was clear: Brave and BAT are built as an alternative to the advertising economics of the incumbent web. The result is the unusual career arc of an engineer who has shaped the same platform twice — once in the 1990s as its foundational language, and again from the 2010s onward as a critical counter-design.