Brendan Eich

Brendan Eich (b. 4 July 1961) is the American computer scientist who, in 1995 at Netscape, prototyped JavaScript in roughly ten days under deadline pressure for Netscape Navigator 2.0. He went on to co-found Mozilla, serve as its CTO, and — briefly, for eleven days in 2014 — as its CEO before a controversy over a personal political donation forced his resignation. In 2016 he co-founded Brave Software, building the privacy-oriented Brave browser and the Basic Attention Token (BAT), and remains its CEO.

Background

Eich was born on 4 July 1961 in Pittsburg, California (the small East Bay town, not the Pennsylvania city). He read mathematics and computer science at Santa Clara University (BS, 1983) and then took an MS in computer science at the University of Illinois at Urbana-Champaign (1986).

He spent seven years at Silicon Graphics working on the IRIX kernel and networking stack, then moved to MicroUnity in 1992 as a compiler engineer for parallel multimedia processors. In April 1995 he joined Netscape Communications Corporation. His formal title at hire was "Server Engineer," but within weeks he had been reassigned to write a scripting language for the Netscape Navigator browser.

Major Contributions

JavaScript (1995-)

In May 1995 Netscape's management decided that the browser needed a lightweight embedded scripting language to ride the Java wave. Alongside a parallel deal with Sun Microsystems to bundle Java itself in Navigator, Eich was told to prototype "something Scheme-like but not Scheme" for the browser.

Eich has often retold the story that he wrote the first working interpreter — internal codename "Mocha" — in about ten days. Those ten days bequeathed to the entire twenty-first-century web platform first-class functions and closures, prototype-based object orientation (borrowed from Self), dynamic typing, and a famous catalogue of inadvertent traps: the dual existence of null and undefined, the difference between == and ===, and the celebrated historical bug that typeof null === "object".

The language shipped in Netscape Navigator 2.0 in December 1995, initially as LiveScript and renamed to JavaScript almost immediately as a piece of marketing co-promotion with Sun's Java. It bears, technically, almost no relation to Java; Eich himself has often said that JavaScript and Java are about as related as Car and Carpet.

Standardisation began under Ecma International's TC39 in 1996, producing the first edition of ECMA-262 — the ECMAScript standard — in 1997. Eich still represents Mozilla on TC39 and has been involved in every annual ECMAScript edition since ES6 (2015), through to ES2025.

Mozilla and Firefox (1998-2014)

In 1998 Netscape opened the source code of its browser as mozilla.org; the company was acquired by AOL the following year. Eich was among the founders of the Mozilla Foundation in 2003 and became CTO of the Mozilla Corporation in 2005.

Firefox — first as Phoenix, briefly Firebird, and from 2004 onwards Firefox — was the only effective rival to Microsoft Internet Explorer in the 2000s and grew at peak to more than 30 per cent of the global browser market. Eich led the technical direction of the SpiderMonkey JavaScript engine and the subsequent generation of JIT compilers (TraceMonkey, JägerMonkey, IonMonkey).

Mozilla CEO and Resignation (2014)

On 24 March 2014 the board of the Mozilla Corporation appointed Eich CEO. Within days, fresh attention came to the fact that in 2008 he had donated 1,000 dollars in support of California's Proposition 8, the state constitutional amendment that prohibited same-sex marriage. The donation had been a matter of public record since 2012; the Los Angeles Times's online database brought it back into circulation. Public pressure, including from the dating site OkCupid and from a portion of Mozilla's own staff, called for his removal.

He resigned eleven days into the role, on 3 April 2014. Mozilla's official statement acknowledged that "we tried to do the right thing and failed." Eich has subsequently said that he was disappointed that his private political donation could not be separated from his technical and managerial judgement. 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 (2016-)

In 2015 Eich co-founded Brave Software with Brian Bondy, formerly of Mozilla. In January 2016 Brave's first beta — a Chromium-based browser that blocks ads and trackers by default — was released. The block-by-default position was a direct continuation of the Do Not Track agenda Eich had championed at Mozilla.

In May 2017 Brave Software raised about 35 million dollars in an Initial Coin Offering for the Basic Attention Token (BAT), an ERC-20 token, which sold out in roughly thirty seconds. The BAT proposition is a direct counter-design to the existing ad-tech market dominated by Google: advertisers pay in BAT for user attention; users opt in to seeing chosen ads and receive the payment directly.

Through 2024 and 2025 Brave has rolled out Leo, an integrated AI assistant. In November 2025 a "verifiable privacy" feature combining Trusted Execution Environments from NEAR.AI and Nvidia entered Brave Nightly, allowing experimentation with DeepSeek V3.1 in a near-local mode. Skills (user-saved prompt templates) and an experimental "agentic AI" mode that runs research or shopping tasks were added the same year.

Awards and Honours

Eich holds no major academic award, but industry recognition includes:

• 2018 — Web Summit Award for Achievement in Web Technology.
• Short-term member, W3C Technical Architecture Group.

He has not received the ACM Turing Award.

Current Activities

Eich continues as Brave Software's CEO and co-founder, based in San Francisco. In 2024 the Brave Wallet was extended to support Bitcoin, Ethereum, Solana, Avalanche, Cardano and other major chains. In a 2025 keynote at the Blockworks Permissionless conference he framed Brave as a "metaphysical rebellion against the big-tech surveillance powers that evolved on JavaScript," positioning the company explicitly as an extension of his late-Mozilla privacy advocacy.

He remains active on X as @BrendanEich, posting on cryptocurrency, libertarian politics and web standards. He continues to serve on TC39.

Legacy

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 has become 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 responded with a clear pivot away from corporate-funded structures: Brave and BAT are the products of that pivot. The result is the unusual career arc of an engineer who has shaped the same web platform twice — once in the 1990s as its foundational language, and again from the 2010s onward as a critical counter-design.