435381 - Inaccurate download speed indicator

Status: VERIFIED DUPLICATE of bug 435380

(Toolkit :: Downloads API, defect)

Description

[The Trystero]

User-Agent:       Mozilla/5.0 (Macintosh; U; PPC Mac OS X 10.4; en-US; rv:1.9) Gecko/2008051202 Firefox/3.0
Build Identifier: Mozilla/5.0 (Macintosh; U; PPC Mac OS X 10.4; en-US; rv:1.9) Gecko/2008051202 Firefox/3.0

Sometimes the speed of the download falls to zero, as properly indicated by the Download Statusbar Add-On. However, on the Download Manager, the speed indicates the last non-zero speed. If one does not have the D-Statusbar addon installed, or is looking only at the Download Manager, you would not know that your download has stalled.

Reproducible: Always

Steps to Reproduce:
1. As a proxy, install Download Statusbar Addon:
https://addons.mozilla.org/en-US/firefox/addon/26
2. Restart Firefox
3. Download a reasonably large file
4. When progress is halfway through and clearly still active, abruptly unplug ethernet/turn off wireless/turn off modem
5. Observe that progress indicator on FF Download Manager stops, but indicates a non-zero speed. Download Statusbar indicates zero speed as expected.

Actual Results:  
Download Manager indicated non-zero speed in middle of file download when there is no internet connection.

Expected Results:  
Speed indicator should be zero.

Comment 2

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

Verified dup