Brendan Eich is an American computer scientist who created JavaScript in 1995 — one of the most impactful programming languages in history, now running on virtually every web page on the internet. He later co-founded the Mozilla Foundation and served as CEO of the Mozilla Corporation before founding Brave Software in 2015, where he built the Brave Browser — a privacy-first Chromium-based browser that blocks ads and trackers by default — and created the Basic Attention Token (BAT), an Ethereum ERC-20 token designed to financially align advertisers, publishers, and users in a user-consented attention economy. Eich is one of the few technologists who has shaped both the foundational layer of the web (JavaScript) and a crypto-native reinvention of web advertising economics.
Background
- Full Name: Brendan Eich
- Nationality: American
- Education: Computer Science, University of Illinois Urbana-Champaign (BS); Santa Clara University (MS)
- Career trajectory: Silicon Graphics → Netscape (created JavaScript) → Co-founded Mozilla Foundation → Mozilla Corporation CEO → Founded Brave Software
- Known for: JavaScript (1995), Firefox (co-founder), Brave Browser, Basic Attention Token
Key Contributions
JavaScript:
- Created JavaScript in 10 days in May 1995 while at Netscape Communications — initially called “Mocha,” then “LiveScript,” then renamed “JavaScript” for marketing alignment with Java
- JavaScript became the de facto scripting language of the World Wide Web — standardized as ECMAScript by ECMA International in 1997
- Today JavaScript powers billions of websites; it is consistently the most-used programming language globally in developer surveys
Mozilla Foundation and Firefox:
- After Netscape was acquired by AOL, Eich helped found the Mozilla Foundation in 2003 — an open-source nonprofit to maintain the Netscape/Gecko codebase
- Firefox browser was released in 2004 — it became the first major challenger to Internet Explorer’s dominance and helped establish browser competition as a public good
- Eich served as Mozilla Corporation CTO and briefly as CEO in 2014 before resigning following controversy over a personal political donation
Brave Browser and BAT:
- Founded Brave Software in 2015 with Brian Bondy
- Brave blocks all third-party ads and trackers by default — delivering pages significantly faster than Chrome
- Brave Ads: An opt-in privacy-respecting ad system where users see browser-level ads and receive 70% of revenue in BAT, while Brave receives 30% and publishers receive BAT tips
- BAT launched in an ERC-20 ICO in May 2017 — raising $35M in under 30 seconds, selling out all tokens in record time
- BAT can be used to tip publishers/content creators directly via the Brave wallet
Brave’s Privacy Model:
- Uses on-device ad matching (no user data sent to servers) — a model called “privacy-preserving advertising”
- Brave has grown to 70M+ monthly active users globally (as of 2024) — making it one of the largest crypto-adjacent user bases outside of exchanges
Timeline
| Year | Event |
|---|---|
| 1995 | Creates JavaScript in 10 days at Netscape |
| 1997 | JavaScript standardized as ECMAScript by ECMA International |
| 2003 | Co-founds Mozilla Foundation after Netscape acquisition by AOL |
| 2004 | Firefox browser released; challenges Internet Explorer dominance |
| 2014 | Briefly serves as Mozilla CEO; resigns due to controversy |
| 2015 | Founds Brave Software with Brian Bondy |
| 2017 | BAT ICO raises $35M in under 30 seconds on Ethereum |
| 2019 | Brave 1.0 launches with Rewards (opt-in Brave Ads / BAT earning) |
| 2021 | Brave hits 36M monthly active users; BAT reaches ATH |
| 2024 | Brave exceeds 70M monthly active users globally |
Common Misconceptions
“Brave forces ads on users.”
Brave’s ad model is entirely opt-in. Users who do not enable Brave Rewards see no ads at all — they browse with Brave’s default ad-blocking enabled. Only users who explicitly opt into Brave Ads receive BAT.
“BAT is primarily a speculative cryptocurrency.”
BAT was designed from the outset as a utility token for advertising — a medium of exchange between advertisers, publishers, and users within the Brave ecosystem. It is one of the few crypto tokens with a clear, functioning product utility case (though it has also been traded speculatively).
“Eich invented Java.”
Eich invented JavaScript — an entirely different language. Despite the similar name, JavaScript and Java are unrelated programming languages. The naming was a marketing decision at Netscape to capitalize on Java’s buzz in 1995.
Criticisms
- BAT circular economy: BAT critics argue that users earning BAT for seeing ads and spending BAT to tip publishers creates a circular economy with limited real monetary output — most users accumulate BAT without converting to traditional currency
- Brave’s ad-blocking business model: Some publishers criticize Brave for blocking all third-party ads (which publishers depend on for revenue) and then offering its own ad system as the alternative — a practice some have called anti-competitive
- 2014 Mozilla controversy: Eich resigned as Mozilla CEO in 2014 following disclosure of his 2008 donation to Proposition 8 (the California same-sex marriage ban ballot initiative) — the controversy raised questions about leadership and organizational values separate from his technical contributions
- BAT centralization: BAT token distribution was criticized at launch for allocating large percentages to the Brave team — concentrated holdings that could affect market dynamics
Social Media Sentiment
Eich is broadly respected in the privacy and open-source software communities for JavaScript and Firefox — foundational contributions to the open web. The Brave browser has strong user loyalty among privacy-conscious users and crypto users. BAT has a dedicated community. His 2014 departure from Mozilla is frequently mentioned in coverage of his career — viewed by different audiences as either principled resignation or forced out for a legitimate personal choice.
Last updated: 2026-04
Related Terms
Sources
- “JavaScript: The First 20 Years” — Wirfs-Brock & Eich, ACM HOPL (2020). A comprehensive academic history of JavaScript’s creation and evolution, co-authored by Eich.
- “Basic Attention Token Whitepaper” — Brendan Eich et al. (2017). The foundational document describing BAT’s design, the Brave Ads system, and the attention economy model.
- “Brave Hits 70 Million Monthly Active Users” — Brave Blog (2024). Company announcement of Brave’s user milestone.
- “The BAT ICO: $35M in 30 Seconds” — CoinDesk (May 2017). News coverage of the Basic Attention Token ICO — one of the fastest tokens sold out in Ethereum ICO history.
- “Firefox’s Market Share and the Open Web” — Mozilla Foundation Annual Report (2006). Chronicles Firefox’s early growth in challenging Internet Explorer’s dominance.