I worked on a new browser for 2 years, today it passed Acid 3
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HN · launched Jul 31, 2026 · 161 upvotes (top 5%) · 1 view
Niche: specialized and developer web browsers · 83 launches, 9 in the last 7 days · Explore this niche →
Category and tags
- Horizontal
- Dev tools
- Prosumer
- Not AI
- Hobby / open-source project
Visit website ↗ Source listing ↗
More like this: all 83 launches in specialized and developer web browsers →
Could you build this?
No Writing a ground-up web browser engine capable of passing the Acid3 compliance test requires years of systems programming across HTML parsing, CSS cascade/layout, and full DOM/JS implementations.
What it would actually take: A browser engine in Zig requires custom implementations of the WHATWG HTML5 tokenizer/tree builder, CSS3 syntax parser and style resolver, custom layout/reflow engine (box model, inline/block formatting, float, table layouts), 2D rendering graphics pipeline, and an ECMAScript runtime binding layer. Passing Acid3 demands rigorous edge-case compliance with DOM Level 2, SVG, XMLHTTPRequest, and legacy web behaviors. This represents tens of thousands of hours of specialized systems programming and web standards compliance work.
Discussion
20 comments analyzed.
Competitors mentioned: Firefox, Servo, Bun
Concerns raised: Segfaults and crashes from complex Zig tools, Missing SVG support and rendering gaps, Text-shaping engine lacks proper inline box model, No source code available, appears to be vaporware, Only Acid3 test shown, not Web Platform Tests coverage
Feature requests: Add Acid2 rendering screenshot for comparison, Show Web Platform Tests coverage instead of just Acid3, Support SVG rendering, Add version without JavaScript and CSS, Provide downloadable binary or source code
Competitors
Other products that read as similar to this one : 74 launches clear the similarity bar, closest 8 shown.
Attention rank: #5 of 75 (itself plus its competitors, highest first, normalized so YC and Product Hunt are compared fairly).
Launched 250 days after the earliest competitor.
- I was drowning in browser tabs, so I built this · hn · 2026-06-19 · 9 upvotes · similarity 0.53
- I built a Chrome extension so Claude can close my 300 tabs · hn · 2026-07-29 · 5 upvotes · similarity 0.46
- Modern Browsers Don't Need the Cookie Anymore · hn · 2026-08-05 · 26 upvotes · similarity 0.43
- I remade my blog into a Windows 3.1 environment · hn · 2026-04-26 · 32 upvotes · similarity 0.43
- I built an Android OS in the browser · hn · 2026-05-30 · 28 upvotes · similarity 0.40
- I got tired of spending 3hrs daily on job applications,so I automated it · hn · 2026-06-27 · 5 upvotes · similarity 0.40
- Kosh · hn · 2026-10-25 · 7 upvotes · similarity 0.40
- 2 Weeks of Hallucinate · hn · 2026-06-13 · 73 upvotes · similarity 0.39
The niche, labels, vibe code rating and competitor comparison on this page are analysis by Nicheloom. If you use them, please credit nicheloom.com. How you may use our data.