453430 - browser lock when some page overload CPU

Status: RESOLVED DUPLICATE of bug 516518

(Firefox :: General, enhancement)

Description

[danykey]

User-Agent:       Mozilla/5.0 (Windows; U; Windows NT 5.1; en-US; rv:1.9.0.1) Gecko/2008070208 Firefox/3.0.1
Build Identifier: Mozilla/5.0 (Windows; U; Windows NT 5.1; en-US; rv:1.9.0.1) Gecko/2008070208 Firefox/3.0.1

When some page(site) overload CPU(for some reason. For example: I have project which contain a lot of javascript code. I waiting about 10 sec while browser loading scripts) - I can't to use browser because UI locking.

If really, then may be need make a page threads with low CPU priority.


Reproducible: Always

Steps to Reproduce:
1. Go to http://mediocre.firstvds.ru/overload.html which contain easy script for overload.

Actual Results:  
I see that UI of browser is locking while performing a jscript.


Expected Results:  
UI of browser is not locked

Comment 1

[Tyler Downer [He/Him]]

This is a mass search for bugs which are in the Firefox General component, are
UNCO, have not been changed for 500 days and have an unspecified version. 

Reporter, can you please update to Firefox 3.6.10 or later, create a fresh profile, http://support.mozilla.com/en-US/kb/managing+profiles, and test again. If you still see the issue, please update this bug. If the issue is gone, please set the status to RESOLVED > WORKSFORME.

Comment 2

[danykey]

I had run test(http://mediocre.firstvds.ru/overload.html) 3.6.10 again but bug still exists.

Also I tried run this test on Chromium browser - UI was not locked and I could to close the overloaded tab without problem.

Comment 3

[Josh Triplett]

This bug still exists in current Firefox; confirming.

As I understand it, the current work on per-tab processes (https://wiki.mozilla.org/Electrolysis) should mostly fix this.