514809 - Freezing FireFox with a lot <input> elements | No Session Restore !

Status: RESOLVED DUPLICATE of bug 477564

(Firefox :: General, defect)

Description

[Nick Neumann]

User-Agent:       Mozilla/5.0 (Windows; U; Windows NT 6.0; de; rv:1.9.1.2) Gecko/20090729 Firefox/3.5.2 (.NET CLR 3.5.30729)
Build Identifier: Mozilla/5.0 (Windows; U; Windows NT 6.0; de; rv:1.9.1.2) Gecko/20090729 Firefox/3.5.2 (.NET CLR 3.5.30729)

Whenever loading a Site, which got a lot of <input> elements like checkboxes or so, the firefox still do not response for a cuple of time depending on how many checkboxes and which size the whole site got.

Tested: 250 checkboxes and normal text, with a html size of 107 kb result in a freeze for about 1-2 seconds.

Reproducible: Always

Steps to Reproduce:
1. Create an amount of checkboxes
   With every new checkbox the freezetime will increase.
2. Just open the site
3. Using any inputs like tabchange , scrolling or just waiting.
Actual Results:  
The Firefox don´t response for a few seconds ( depending on how many checkboxes and which size the whole site got ), after loading the site.

Expected Results:  
nothing else

Comment 1

[Nick Neumann]

Attachment: 500 Checkboxes | FF hangs for about 10-12 seconds

Comment 2

[Boris Zbarsky [:bzbarsky]]

When you say no session restore, do you mean you set browser.sessionstore.privacy_level to 2?  If not, then session restore is always active, so as to be able to recover from crashes.  And if you didn't set that preference, you're seeing bug 477564.