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docs: sanitize CHANGELOG #18 entry + remove obsolete Known issues section

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Two-part cleanup:

- CHANGELOG.md #18 entry: rewrite the symptom description without
  naming the specific third-party site that originally reported it.
  The technical root cause and fix are unchanged.

- README.md: remove the entire "Known issues" section. Its only entry
  was the headless=True alt-desktop crash from #18, which was fully
  fixed in 0.1.7 / firefox-7. Leaving the workaround instructions in
  the README would have misled users into adopting them
  unnecessarily. New issues can be added back as they're found; the
  default state is "no known issues".

Pre-push: 402 unit + integration tests pass.

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>
This commit is contained in:
feder-cr 2026-05-23 10:23:34 -07:00
parent 64eef4daff
commit 34aeb9601f
2 changed files with 1 additions and 19 deletions
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2
CHANGELOG.md
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@ -20,7 +20,7 @@ The format is based on [Keep a Changelog](https://keepachangelog.com/en/1.1.0/),
## [0.1.7] - 2026-05-21
### Fixed
- [#18](https://github.com/feder-cr/invisible_playwright/issues/18): Tab crash on `id.sky.com` and similar sites when running with `headless=True` on Windows. Two separate bugs that only triggered together: (1) the Chromium content sandbox at default level 6 puts content processes on `kAlternateWinstation`, but the wrapper hides the browser window on its own alt-desktop (`CreateDesktop` for headless on Windows). Mismatched desktops → cross-process navigations (Adobe AppMeasurement on id.sky.com triggers them) couldn't reparent windows → content process exits cleanly and Playwright fires `page.on('crash')`. (2) The canvas2d `getImageData` stealth spoof wrote to a read-only mapped `DataSourceSurface`. On GPU-backed canvases that memory is write-protected → segfault during the final `getImageData` id.sky.com runs at page unload. Wrapper now sets `security.sandbox.content.level=4` in the alt-desktop workaround set, and `firefox-7` ships the source fix that moves the noise to the JS array's writable backing buffer. Reporter: [@gamefireat123-eng](https://github.com/gamefireat123-eng).
- [#18](https://github.com/feder-cr/invisible_playwright/issues/18): Tab crash when running with `headless=True` on Windows on pages that trigger cross-process navigation. Two separate bugs that only manifested together: (1) the Chromium content sandbox at default level 6 puts content processes on `kAlternateWinstation`, but the wrapper hides the browser window on its own alt-desktop (`CreateDesktop` for headless on Windows). Mismatched desktops → cross-process navigations couldn't reparent windows → content process exits cleanly and Playwright fires `page.on('crash')`. (2) The canvas2d `getImageData` stealth spoof wrote to a read-only mapped `DataSourceSurface`. On GPU-backed canvases that memory is write-protected → segfault during the final `getImageData` at page unload. Wrapper now sets `security.sandbox.content.level=4` in the alt-desktop workaround set, and `firefox-7` ships the source fix that moves the noise to the JS array's writable backing buffer.
### Changed
- `BINARY_VERSION` bumped from `firefox-5` to `firefox-7`. `firefox-6` was rolled back when its partial fix turned out to be wrong (the iframe-burst hypothesis was a dead end; bisection in the evening found the real two-bug cause documented above).

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README.md
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@ -203,24 +203,6 @@ invisible_playwright version # wrapper and binary versions
invisible_playwright clear-cache # remove all cached binaries
```
## Known issues
### `headless=True` on Windows can cause tab crashes on sites with heavy cross-process navigation
Reported as [#18](https://github.com/feder-cr/invisible_playwright/issues/18) (`id.sky.com` and similar). On Windows, `headless=True` runs Firefox headed on a hidden alt-desktop created via `CreateDesktop`. Some sites (id.sky.com, anything else loading Adobe AppMeasurement in a way that triggers cross-process navigation) end up firing `page.on('crash')` after about 10 seconds. The cause is a window-parenting interaction between the alt-desktop and the GPU/content processes; the workaround is one of:
```python
# Option A — keep the visible window (no alt-desktop)
with InvisiblePlaywright(seed=42, headless=False) as browser:
...
# Option B — run inside Xvfb on Linux (alt-desktop bug is Windows-only)
```
The visible window case works on every site we've tested. Linux + Xvfb is unaffected.
---
## Related projects
invisible_playwright takes a different angle than the major Firefox-hardening projects but stands on their shoulders: