600597 - Firefox hangs if <input> field with -moz-transition style and a placeholder loses focus

Status: RESOLVED DUPLICATE of bug 598726

(Core :: General, defect)

Description

[Norbert Pozar]

User-Agent:       Mozilla/5.0 (Windows NT 5.1; rv:2.0b6) Gecko/20100101 Firefox/4.0b6
Build Identifier: Mozilla/5.0 (Windows NT 5.1; rv:2.0b6) Gecko/20100101 Firefox/4.0b6

When an <input> text field is set up with -moz-transition and also -moz-transform: scale(..) on focus, and it has a placeholder, Firefox hangs after some text is entered and focus is lost. See the attached HTML testcase for an example.  

Reproducible: Always

Steps to Reproduce:
1. enter some text into the text field
2. click elsewhere on the page so that the field loses focus
Actual Results:  
Firefox hangs, CPU usage goes to 100% (50% on my dual core)

Expected Results:  
text field should lose focus

I came across this problem when visiting http://www.bradshawenterprises.com/tests/formdemo.php

This is my first bug report, I'm not sure what the correct component is, I entered "General".

Comment 1

[Norbert Pozar]

Attachment: HTML testcase that shows the problem

Comment 3

[Boris Zbarsky [:bzbarsky]]

Norbert, thank you for the bug report!  The testcase was particularly appreciated, since it made it very clear what the issue is.