User Agent: Mozilla/5.0 (X11; Linux x86_64; rv:22.0) Gecko/20100101 Firefox/22.0 (Beta/Release) Build ID: 20130618035212 Steps to reproduce: On Linux 64b and Windows 32b Versions, ( work fine on Mac version ) A picture who is resize and rotate when i am on it . i add the box-shadow to add an effect . The css : box-shadow: 0px 0px 10px #000; -webkit-transform: scale(3) rotate(90deg); /* Chrome, Safari 3.1+ */ -moz-transform: scale(3) rotate(90deg); /* Firefox 3.5+ */ -ms-transform: scale(3) rotate(90deg); /* IE 9 */ -o-transform: scale(3) rotate(90deg); /* Opera 10.50-12.00 */ transform: scale(3) rotate(90deg); /* Firefox 16+, IE 10+, Opera 12.10+ */ z-index: 9999; A complete example is attached to this message Actual results: the image is rotated and resized, but the image is highly degraded. Expected results: The image must stay with the same quality after the transformations.

STR: 1) Open the testcase 2) Hover the pictures Result: When the picture is displayed only 1 time in the webpage, the thumbnail and the transformed picture are blurry when box-shadow is applied. Regression range: good=2012-10-17 bad=2012-10-18 http://hg.mozilla.org/mozilla-central/pushloghtml?fromchange=dac5700acf8b&tochange=cb573b9307e5 Suspected bug: bug 795940

Regression window with force image.high_quality_downscaling.enabled=true Good: http://hg.mozilla.org/integration/mozilla-inbound/rev/eda2891c545b Mozilla/5.0 (Windows NT 6.1; WOW64; rv:18.0) Gecko/18.0 Firefox/18.0 ID:20120928090936 Bad: http://hg.mozilla.org/integration/mozilla-inbound/rev/92530b29ac24 Mozilla/5.0 (Windows NT 6.1; WOW64; rv:18.0) Gecko/18.0 Firefox/18.0 ID:20120928100437 Pushlog: http://hg.mozilla.org/integration/mozilla-inbound/pushloghtml?fromchange=eda2891c545b&tochange=92530b29ac24 Regressed by: Bug 486918

Bug 1060200 that landed in FF35 has modified the rendering of the testcase. Now, the graph thumbnail is blurry and the rotated images too in both cases.

Does this still reproduce?

Works for me on 45.3.0ESR, 49.0RC4 and Nightly52.0a1 on Windows10 as well

It's fixed, both images are not blurry anymore, even if there is a very small difference between both.