From Bugzilla Helper: User-Agent: Mozilla/5.0 (Windows; U; Windows NT 5.1; en-US; rv:1.1b) Gecko/20020721 BuildID: 2002072104 I did not notice this problem until yesterday, when I noticed programs loading very slowly while I was browsing with Mozilla. I noticed that my CPU load was stuck at 100%, and when checking the program idle list, Mozilla was the program taking up all the resources. I closed Mozilla and re-opened it to the page, and the same happened. I thought it could be some of the repetitive animated gifs. I then tried opening lots of pages on a forum in many tabs, but the CPU load was normal. I forgot about it until today when I open 3 or so tabs of (yu-gi-oh) websites, and it happens again (and is still at 100% as I'm typing this). It does not go away until I close Mozilla. I'm quite sure this didn't happen in earlier Mozilla releases, and I'm really not sure why this happens. The bug 146544 may relate to this, but since it blames a flash movie as the problem, I'm not sure that it is the same bug, as shockwave movies were not present either time the cpu load problem comes up. Reproducible: Sometimes Steps to Reproduce: 1. Open Mozilla 2. Today I opened the following websites in tabs: http://www.yugiohkingofgames.com/ http://yugioh-dungeon.com/home.shtml http://duel-monsters.com/ 3. Followed each page link to main page. Actual Results: Pages loaded, but CPU load rose and stayed at 100%, until the browser closes, which I have not done yet because I am filing this bug report.

It seems that this URL in particular triggerred it. Possibly the animated gif on the left? http://www.yugiohkingofgames.com/news2.html

a) can you reproduce it only sometimes at this URL ? b) DO you still see 100% if you leave the page ? c) if b=yes : Have you enabled Http pipelining ?

In response to Comment 1: > Possibly the animated gif on the left? It might rather be Flash menu on top. Possible dupes: bug 132759, bug 146884

http://www.yugiohkingofgames.com/news2.html has a flash animation... duplicate. *** This bug has been marked as a duplicate of 132759 ***