WISP

Hold

Techniques

A protocol for carrying TCP traffic over WebSockets.

Why it's here

Placed in Hold: 1 article(s) of evidence from 2 source(s), led by research-stage coverage, with 1 in the last 30 days. Confidence 32%.

5Simon Willison·7/15/2026research
Firefox Browser Running in WebAssembly
A developer demo shows the full Firefox browser, including Gecko, UI components, and the SpiderMonkey JavaScript engine, compiled to run inside WebAssembly. The project uses WISP for TCP over WebSockets and includes an experimental WASM-to-JS JIT for performance testing. The author describes it as a technical experiment and points to a lighter browser-in-browser project for practical use.

Your vote is a weighted signal that nudges the radar — never a direct override.

AssessHoldConfidence31%

Business→ Steady
For BD, WISP is not yet a primary selling point for partnerships or commercial commitments; it is still a technical topic to explore for very specific use cases. The Firefox-in-WebAssembly example strengthens technical credibility, but it is not enough to become a strong market narrative.
Developers→ Steady
WISP is no longer in a rising phase, so for developers it is mainly a technique to keep in view when packaging or running heavy applications in the browser. The Firefox-in-WebAssembly example shows the direction is real, but not yet strong enough to treat it as a default architectural choice.
Product→ Steady
For PMs, WISP is better treated as a technical capability that may unlock some specialized experiences rather than something to place broadly on the roadmap. The Firefox-in-WebAssembly news confirms feasibility, but not enough to prioritize productization if the goal is broad user reach.
Testers / QA→ Steady
For test, WISP increases the need to validate WebAssembly execution behavior, especially compatibility, performance, and browser-environment limits. But because the technology has been demoted to Hold, this remains a specialized testing area rather than a broadly adopted standard.

as of 7/17/2026

Educated guesses from the trend — you decide.