Shared components used by Firefox and other Mozilla software, including handling of Web content; Gecko, HTML, CSS, layout, DOM, scripts, images, networking, etc. Issues with web page layout probably go here, while Firefox user interface issues belong in the Firefox product. (More info)
Created attachment 590180[details][diff][review]
Mark MCall, MGetPropertyCache and MNewArray as not congruent. Fixes xparb and v8-raytrace.
We should probably file a follow-up bug to default to non-congruent to avoid these bugs...