1403763 - When tab switching while downloading an extension, the arrow panel briefly displays garbage values

Status: NEW

(Toolkit :: Add-ons Manager, defect, P5)

Description

[Markus Stange [:mstange]]

Attachment: screenshot

Steps to reproduce:
 1. Click the install button for a large add-on, for example https://addons.mozilla.org/en-US/firefox/addon/embark-for-firefox/
 2. While the arrow panel with the progress bar is showing, switch to a different tab.
 3. Switch back to the tab that the add-on is installing in.

The download progress text now says, for a brief moment:

Unknown time left - 0 bytes (-1,234,567 bytes/sec)

After a second or two it corrects itself.
The progress bar is still filled to the right degree during the time when the text is wrong.


It would be nice if the text also remembered the number of bytes that have already been downloaded so that it doesn't display garbage values.