On my end, it uses 45%, which means there's something off-main-thread running (one core uses 25%).
Status: UNCONFIRMED → NEW
Ever confirmed: true
If set image.high_quality_downscaling.enabled = false , the problem does not happen. Regressio window(m-i) 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
Severity: normal → major
Component: Untriaged → ImageLib
Product: Firefox → Core
Version: 26 Branch → 19 Branch
I found that the other bug #846315 is caused by the same problem. That bug was first reported almost a year ago. Is there any chance for the cause of the problem to be fixed this year?
Can you guys still reproduce this?
I can still reproduce the problem in Nightly32.0a1. https://hg.mozilla.org/mozilla-central/rev/5bbc85136202 Mozilla/5.0 (Windows NT 6.1; WOW64; rv:32.0) Gecko/20100101 Firefox/32.0 ID:20140507030202
Hi Anyone aware if this is bug fixed in the latest version 32 of firefox? I still see CPU cycles when loading bootstrap.css...in 32 version also. regards vijay
Hi, I tested this today and is still happening on stable Firefox 33.0 and in Beta 34.0, with a lower CPU consumption on Beta on my case (but still a problem). On Windows 7. But seems solved on Nightly, version 36.0a1 (2014-10-21), an in Aurora 35.0a2 (2014-10-21), so *we may* expect the fix to be on stable version 35.0, right? May be because of the fix of 846315?
Hi! I was creating another responsive website and found another instance of strange Firefox behavior with background images. I even made a video to demonstrate: http://www.youtube.com/watch?v=Wv_CLBapKIU I'm sure that users of single-CPU computers will not like this website (because of the cooler fan noise) due to this Firefox bug. The wobbling consumes 80-100% of a single CPU.
This is similar to bug 927377, and tn thinks the problem may have been fixed (see bug 927377 comment 5). Alice, can you still reproduce? Thank you.
WFM on Nightly44.0a3
Thank you for the update, Alice. I will close this bug accordingly. gnatko, please reopen if you still have problems in current Firefox versions.
Status: NEW → RESOLVED
Last Resolved: 4 years ago
Resolution: --- → WORKSFORME
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