421100 - Download completes halfway through and file gets downloaded partially

Status: UNCONFIRMED

(Toolkit :: Downloads API, defect)

Description

[Nothing]

User-Agent:       Mozilla/5.0 (Windows; U; Windows NT 5.1; en-US; rv:1.8.1.12) Gecko/20080201 Firefox/2.0.0.12
Build Identifier: Mozilla/5.0 (Windows; U; Windows NT 5.1; en-US; rv:1.8.1.12) Gecko/20080201 Firefox/2.0.0.12

I was downloading a YouTube FLV video (11 mb)  and after the file was 50% downloaded, FireFox said the  file had downloaded. Upon  running , only half the clip was playable.
Happens mostly with .zip and .rar archives.

Reproducible: Sometimes

Steps to Reproduce:
1. Download any file, preferably of zip type which is over 10 MBs
2.Problem appears mostly on slow connections under 100 kb/ps 
3.After the file download is halfway done , the download will exit and Mozilla will report of having downloaded all files succesfully
Actual Results:  
The file downloads partially and is worthless.

Expected Results:  
The file should have downloaded fully.

Comment 1

[Stephen Donner [:stephend] Not actively reading bugmail]

You're using an extension to download, right?  Are you using Video DownloadHelper, or another one, if so?  You should be aware of https://addons.mozilla.org/en-US/firefox/discussions/?AddOnID=3006, if you are.

Comment 2

[Nothing]

No Stephen, I'm using the download manager which comes with firefox.
As I said, the bug happens mostly with zip and rar archive files.

Comment 3

[Efi Shuv]

I had this bug recently. You can test it on a low bandwidth or when you switch between Wi-Fi networks. The temporery lost of conection cause this bug.