User-Agent: Mozilla/5.0 (Windows; U; Windows NT 5.1; en-US; rv:1.8a5) Gecko/20041101 Firefox/0.9.1+ Build Identifier: Mozilla/5.0 (Windows; U; Windows NT 5.1; en-US; rv:1.8a5) Gecko/20041101 Firefox/0.9.1+ In this test case i embed a heavy flash file (161k) with lots of things in motion at the same time to demonstrate the different cpu outputs I keep getting. On Internet Explorer I obtain a cpu output of between 57-63% On Mozilla and Firefox the cpu is at 100% constant. If wmode is not used, then the browsers are identical in performance, setting wmode causes the problem to appear. I'm on Pentium 4, 2.53, with 512 megs of ram. Reproducible: Always Steps to Reproduce: 1.Set a flash movie to wmode="transparent" or wmode="opaque" 2. 3. Actual Results: CPU peaked at 100% on moz Expected Results: Be comparable to Internet Explorer In performance

yes it's true, some consideration explorer-transparent: 60-70% firefox-transparent: 100% explorer-opaque: 65-75% firefox-opaque: 60-70%

Note that the flash binaries used by IE and Firefox are different... this could well be an issue in the flash binaries themselves.

I've seen this behavior on tons of websites, especially with those annoying animated Flash ads. Sometimes it's so bad I have to disable Flash to even attempt to browse the site because the CPU is pegged at 100%. Since IE also has issues, just not as bad, I'd guess this is a half Firefox/half Flash plugin problem.

This is an automated message, with ID "auto-resolve01". This bug has had no comments for a long time. Statistically, we have found that bug reports that have not been confirmed by a second user after three months are highly unlikely to be the source of a fix to the code. While your input is very important to us, our resources are limited and so we are asking for your help in focussing our efforts. If you can still reproduce this problem in the latest version of the product (see below for how to obtain a copy) or, for feature requests, if it's not present in the latest version and you still believe we should implement it, please visit the URL of this bug (given at the top of this mail) and add a comment to that effect, giving more reproduction information if you have it. If it is not a problem any longer, you need take no action. If this bug is not changed in any way in the next two weeks, it will be automatically resolved. Thank you for your help in this matter. The latest beta releases can be obtained from: Firefox: http://www.mozilla.org/projects/firefox/ Thunderbird: http://www.mozilla.org/products/thunderbird/releases/1.5beta1.html Seamonkey: http://www.mozilla.org/projects/seamonkey/

This problem is still there as of 1.5 beta 1.

URL is gone, but duping based on comment 0 which mentions opaque

wrong dupe