microsoft / playwright · Issue No. 42717

[MCP] WebP screenshot above 16383 px returns an empty image

Openby SixFive7opened Sep 14, 2026updated Sep 22, 20263 comments

v1.64

Description

browser_take_screenshot with type webp and fullPage on a document taller than 16383 px returns an empty image and writes a zero-byte file, with no error. 16383 px works, 16384 px does not. png and jpeg are fine at the same heights.

This looks like the WebP dimension limit surfacing as success. An error, or a fallback to png above the limit, would make the result honest.

Seen with @playwright/mcp 0.0.80, playwright-core 1.63.0-alpha-2026-08-31, Chromium 153.0.8010.12, Windows 11.

Relay Analysis

View on GitHub

Relay reads this issue against the repository's contribution signals: the files it is likely to touch, how the maintainers triage work this size, and what the first contribution would exercise.

The full analysis for this issue is still being assembled. Until then, the description above and the thread on GitHub are the most reliable context.