303037 - High CPU utilization at cbronline

Status: RESOLVED DUPLICATE of bug 207681

(Firefox :: General, defect)

Description

[newton]

User-Agent:       Mozilla/5.0 (Macintosh; U; PPC Mac OS X Mach-O; en-US; rv:1.8b2) Gecko/20050607 Firefox/1.0+ Netscape/7.1 (PowerBook)
Build Identifier: Mozilla/5.0 (Macintosh; U; PPC Mac OS X Mach-O; en-US; rv:1.8b2) Gecko/20050607 Firefox/1.0+ Netscape/7.1 (PowerBook)

Visiting the URL listed above causes CPU utilization to climb to 100%.

There are actually lots of URLs which do this, but I just happen to have found
this one at a time when I'm not too busy to file something in bugzilla :-)

Reproducible: Always

Steps to Reproduce:
1.  Visit website
2.  View CPU stats.

Actual Results:  
Computer gets very slow, CPU gets very hot, laptop fan starts up, user gets annoyed.

Expected Results:  
Displayed website then gone to sleep until user tried to do something else.

Obviously busywaiting somewhere.  URL includes a flash-based ad (which doesn't
do anything -- just displays a completely static image of Adobe's Acrobat 7.0
logo with a "Visit Site" link in the top left corner)

Suggestion to get rid of this:  Include flash in the same options which allow
you to disable Javascript, etc.  I can't currently see any way to disable flash,
even though I'm fairly sure that it's the culprit that is causing CPU congestion.

Comment 1

[Ria Klaassen (not reading all bugmail)]

Hm, loading the site with flash enabled I see CPU usage of 2-5% with some
sporadic peaks of 45%.
But in IE I see 80-90% continuously. 
Mozilla/5.0 (Windows; U; Windows NT 5.1; en-US; rv:1.8b4) Gecko/20050801
Firefox/1.0+ ID:2005080121

Comment 2

[zug_treno]

(In reply to comment #0)
> Suggestion to get rid of this:  Include flash in the same options which allow
> you to disable Javascript, etc.
  
See bug 184179 -> bug 94035.