627049 - With javascript activated, appears to leak memory and eat 100 % cpu

Status: RESOLVED INVALID

(Firefox :: General, defect)

Description

[Jérôme Borme]

User-Agent:       Mozilla/5.0 (X11; Linux x86_64; rv:2.0b9) Gecko/20100101 Firefox/4.0b9
Build Identifier: Mozilla/5.0 (X11; Linux x86_64; rv:2.0b9) Gecko/20100101 Firefox/4.0b9

The provided URL causes Firefox 4.0b9 to use all of CPU. Memory usage diverges to the Gb until it goes to swap and I have to kill it. Closing the tab stops the CPU load but does not remove the huge memory usage.

It does not happen when the javascript is desactivated in Edit/Preferences dialog.

I tested both x86_64 and 32 bit builds of Firefox 4.0b9 with no addons.

It does not happen with Firefox 3.6.13.


Reproducible: Always

Steps to Reproduce:
1. open the referred URL.
2. use "top" command-line utility to monitor load and memory usage.
3.

Comment 1

[Matthias Versen [:Matti]]

I can't reproduce the memory problem with Mozilla/5.0 (Windows NT 6.1; rv:2.0b10pre) Gecko/20110119 Firefox/4.0b10pre SeaMonkey/2.1b2pre or FF4.0b9

Please try http://support.mozilla.com/en-US/kb/Safe+Mode

Comment 2

[Jérôme Borme]

Ok I found why you cannot reproduce it, it happens with my filtering proxy Privoxy. But I still get the problem in safemode with latest nightly build (linux), when privoxy is in use. What should I do, post here the HTML that privoxy passes to the browser?

Comment 3

[Matthias Versen [:Matti]]

You should find the differences. It's possible that your proxy changes some things that causes a loop in some JS function. Do you tested it with other browsers ?

Comment 4

[Jérôme Borme]

Following your advices, I found that same thing happens with other browsers (konqueror, chromium). I'm closing it for now. I'll first report the issue to the proxy bug tracker. For information, one second of the proxy log looks like that (I cropped the URLs).

Jan 19 22:14:36.019 Request: www.presseurop.eu/sites/all/themes/pre
Jan 19 22:14:36.028 Crunch: Blocked: http://pubs.lemonde.fr/RealMed
Jan 19 22:14:36.031 Crunch: Blocked: http://pubs.lemonde.fr/RealMed
Jan 19 22:14:36.036 Crunch: Blocked: http://pubs.lemonde.fr/RealMed
Jan 19 22:14:36.041 Crunch: Blocked: http://pubs.lemonde.fr/RealMed
Jan 19 22:14:36.041 Crunch: Blocked: http://pubs.lemonde.fr/RealMed
Jan 19 22:14:36.087 Crunch: Redirected: http://www.facebook.com/ext
Jan 19 22:14:36.100 Request: www.presseurop.eu/files/images/briefco
Jan 19 22:14:36.104 Request: www.presseurop.eu/files/images/article
Jan 19 22:14:36.104 Request: www.presseurop.eu/files/images/article
Jan 19 22:14:36.105 Request: www.presseurop.eu/files/images/article
Jan 19 22:14:36.110 Request: www.presseurop.eu/files/images/topic/e
Jan 19 22:14:36.111 Request: www.presseurop.eu/files/images/topic/I
Jan 19 22:14:36.149 Request: connect.facebook.net/fr_FR/all.js
Jan 19 22:14:36.150 Request: www.presseurop.eu/files/images/topic/i
Jan 19 22:14:36.157 Request: www.presseurop.eu/files/images/topic/r
Jan 19 22:14:36.179 Request: static.ak.fbcdn.net/connect/xd_proxy.p
Jan 19 22:14:36.180 Crunch: Blocked: http://logi8.xiti.com/hit.xiti
Jan 19 22:14:36.181 Request: www.presseurop.eu/sites/all/themes/pre
Jan 19 22:14:36.191 Request: www.presseurop.eu/sites/all/themes/pre
Jan 19 22:14:36.191 Request: www.presseurop.eu/sites/all/themes/pre
Jan 19 22:14:36.213 Request: www.presseurop.eu/sites/all/themes/pre
Jan 19 22:14:36.228 Request: www.presseurop.eu/sites/all/themes/pre
Jan 19 22:14:36.228 Request: www.presseurop.eu/sites/all/themes/pre
Jan 19 22:14:36.241 Request: www.presseurop.eu/sites/all/themes/pre
Jan 19 22:14:36.261 Request: www.presseurop.eu/sites/all/themes/pre
Jan 19 22:14:36.261 Crunch: Redirected: http://platform0.twitter.co
Jan 19 22:14:36.262 Request: www.presseurop.eu/sites/all/themes/pre
Jan 19 22:14:36.275 Crunch: Blocked: http://logi8.xiti.com/hit.xiti
Jan 19 22:14:36.276 Request: www.presseurop.eu/sites/all/themes/pre
Jan 19 22:14:36.327 Crunch: Blocked: http://logi8.xiti.com/hit.xiti
Jan 19 22:14:36.505 Crunch: Blocked: http://logi8.xiti.com/hit.xiti
Jan 19 22:14:36.560 Crunch: Blocked: http://logi8.xiti.com/hit.xiti
Jan 19 22:14:36.611 Crunch: Blocked: http://logi8.xiti.com/hit.xiti
Jan 19 22:14:36.701 Request: www.presseurop.eu/fr/content/news-brie