361314 - XMLHttpRequest failed when used in *first* external script on the page.

Status: RESOLVED INVALID

(Firefox :: General, defect)

Description

[1m.dm]

User-Agent:       Mozilla/5.0 (Windows; U; Windows NT 5.1; en-US; rv:1.8.0.8) Gecko/20061025 Firefox/1.5.0.8
Build Identifier: Mozilla/5.0 (Windows; U; Windows NT 5.1; en-US; rv:1.8.0.8) Gecko/20061025 Firefox/1.5.0.8

I use ScriptLoader class to dynamically load JS-files. It uses synchronous XMLHttpRequest to load external script, and then evaluates received contents. Right after definition of the ScriptLoader class I use it to load script.js that alerts 'Success.' string. The problem is occured when loader.js is attached in the head of a page in the first place, with no preceding <script /> elements that loads external scripts. I have tested that many times to figure the problem out. View the example at http://1m.kiev.ua/dynjsloadtest/. As you can see (I use FireBug), XMLHttpRequest works well only in approx. 30%-40% cases (alerting 'Success.'). Other 60%-70% are fails.

Reproducible: Sometimes

Steps to Reproduce:
See details.



See details.

Comment 1

[Boris Zbarsky [:bzbarsky]]

Is this a problem if you disable FireBug?  I can't reproduce this problem with a current trunk build.

Comment 2

[1m.dm]

(In reply to comment #1)
> Is this a problem if you disable FireBug?  I can't reproduce this problem with
> a current trunk build.
> 

Oops. Seems like disabling FireBug solves the problem. I don't even think about FireBug can cause this problem. I'm very sorry for your time spend.