Bug 1866409 Comment 12 Edit History

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This bad loop seems to cause issues with the Dark Reader addon as well:
https://github.com/darkreader/darkreader/issues/11834
https://github.com/darkreader/darkreader/issues/11943

Lots of reports from Fedora there, and in the profiles shared ([1](https://share.firefox.dev/3QmyiOh), [2](https://share.firefox.dev/40Q9YrE)) we are stuck in `nsRFPService::RandomizePixels()`, called from [`CanvasRenderingContext2D.getImageData()`](https://developer.mozilla.org/en-US/docs/Web/API/CanvasRenderingContext2D/getImageData).

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