pierruno-labs

pierruno-labs/prowl

Prowl: a small web browser written in Rust with its own HTML/CSS rendering engine — no WebView, no JavaScript.

7 good first / help-wanted issues · Rust · last activity Oct 14, 2026

9 stars 1 forks 9 watchers Rust
browser css html layout-engine rendering-engine rust web-browser
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7 Open Issues Need Help Last updated: Oct 14, 2026

Open Issues Need Help

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[A-24] `GetDIBits` called while the bitmap is still selected into the DC (MSDN says not to) 13 days ago
bug good first issue security audit severity: info priority: P3 type: correctness area: screenshot
pierruno-labs/prowl
9

Prowl: a small web browser written in Rust with its own HTML/CSS rendering engine — no WebView, no JavaScript.

Rust
#browser#css#html#layout-engine#rendering-engine#rust#web-browser
[A-23] `--screenshot … <huge width>` wraps `width*height` → short buffer → panic 13 days ago
bug good first issue security audit severity: low priority: P3 type: crash area: cli
pierruno-labs/prowl
9

Prowl: a small web browser written in Rust with its own HTML/CSS rendering engine — no WebView, no JavaScript.

Rust
#browser#css#html#layout-engine#rendering-engine#rust#web-browser
[A-22] `file:` reads have no size cap; device paths may block 13 days ago
bug good first issue security audit severity: low priority: P3 type: denial-of-service area: network
pierruno-labs/prowl
9

Prowl: a small web browser written in Rust with its own HTML/CSS rendering engine — no WebView, no JavaScript.

Rust
#browser#css#html#layout-engine#rendering-engine#rust#web-browser
[A-21] Page texture can exceed the GPU's max texture size on very large windows (needs verification) 13 days ago
bug good first issue security audit severity: low priority: P3 type: crash area: browser-ui status: needs verification
pierruno-labs/prowl
9

Prowl: a small web browser written in Rust with its own HTML/CSS rendering engine — no WebView, no JavaScript.

Rust
#browser#css#html#layout-engine#rendering-engine#rust#web-browser
[A-14] Quadratic paths in the tokenizer, tree builder, cascade, list numbering, painting, tables and text breaking 13 days ago
bug help wanted security audit severity: medium priority: P2 type: denial-of-service type: performance area: html area: style area: layout area: paint-font fallback mode only
pierruno-labs/prowl
9

Prowl: a small web browser written in Rust with its own HTML/CSS rendering engine — no WebView, no JavaScript.

Rust
#browser#css#html#layout-engine#rendering-engine#rust#web-browser
[A-11] Unbounded nesting (`:not(`, `calc(`, `light-dark(`, `@media{`, deep DOM) → stack overflow 13 days ago
bug help wanted security audit severity: high priority: P1 type: crash area: html area: css area: layout fallback mode only
pierruno-labs/prowl
9

Prowl: a small web browser written in Rust with its own HTML/CSS rendering engine — no WebView, no JavaScript.

Rust
#browser#css#html#layout-engine#rendering-engine#rust#web-browser
[A-08] `:nth-child(-n-2147483647)` → `i32::MIN % -1` panic 13 days ago
bug good first issue security audit severity: high priority: P1 type: crash area: css fallback mode only
pierruno-labs/prowl
9

Prowl: a small web browser written in Rust with its own HTML/CSS rendering engine — no WebView, no JavaScript.

Rust
#browser#css#html#layout-engine#rendering-engine#rust#web-browser