User Agent: Mozilla/5.0 (Windows NT 5.1; rv:41.0) Gecko/20100101 Firefox/41.0 Build ID: 20151014143721 Steps to reproduce: After updating to 42.0, opened 10 web pages in 10 tabs, waited about 10 minutes. All pages were part of www.wunderground.com or www.nws.noaa.gov. Actual results: Firefox 42.0 using 75% of dual core CPU, responds very slowly when clicking on a tab. Removed and re-installed Firefox 42.0 -- same problem. Removed 42.0, installed 41.0.2 -- problem gone. Expected results: Should have performed similar to previous version (41.0.2) -- CPU usage of 4% to 40%, responds reasonably when clicking on a tab.
DonB, please can you confirm whether this issue is still reproducible when you start Firefox with a new profile? https://support.mozilla.org/en-US/kb/profile-manager-create-and-remove-firefox-profiles
(In reply to Simona B from comment #1) > DonB, please can you confirm whether this issue is still reproducible when > you start Firefox with a new profile? > https://support.mozilla.org/en-US/kb/profile-manager-create-and-remove- > firefox-profiles Hi Simona, I received your request. I will re-upgrade to 42.0 and give it a try. Thanks, donB
DonB, do you have updates?
(In reply to Simona B from comment #3) > DonB, do you have updates? Sorry for delay in responding (I was spending a LOT of time at hospice where a long-time neighbor and friend was spending his last few days). I re-updated to 42.0 and tried to re-produce the problem both with a new profile and with the old profile. Using the exact same 10 URLs in the same sequence of tabs, I was NOT able to reproduce the problem with EITHER profile. One of the websites (www.nws.noaa.gov) has revised some of its pages in the interim. I now suspect that the problem was a faulty script (from one of the revised web pages) that bothered 42.0 more than it bothered 41.0.2. I have now been running 42.0 (with the problem-inducing tabs always open) for 48 hours with NO problems. Unless somebody else has also experienced this problem, I think it should closed.
(In reply to Simona B from comment #3) > DonB, do you have updates? Thank you, Simona.
Based on Comment 4, I'm setting the resolution of this bug to Resolved Worksforme. Thank you DonB for taking the time to investigate this.
Status: UNCONFIRMED → RESOLVED
Last Resolved: 2 years ago
Resolution: --- → WORKSFORME
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