755955 - The reftest framework runs the test and the reference with random :hover state - causing random orange

Status: NEW

(Testing :: Reftest, defect)

Description

[Mats Palmgren (inactive)]

Follow-up from bug 755025 which wallpapered this bug for a couple of tests.

It seems the reftest framework doesn't guarantee that the synthetic mouse event
that triggers :hover on document load has been run, so there's a race between
that and the snapshot being taken.  This can cause the test and reference
to have different state causing orange if the mouse pointer happens to be
over a form control, scrollbar etc which has :hover styling.