(This may be overkill, but here's how I did it:) Go to this page (http://www.geocities.com/NapaValley/Cellar/3517/recipes.html). Let it load. Click on a recipe (I used "Janet's Double D Ambrosia Cups"). Hit back. Then before everything (images) loads click on the link to a recipe again. Observe assertions. ###!!! ASSERTION: Channel list is not empty.: 'count == 0', file nsLoadGroup.cpp, line 238 ###!!! Break: at file nsLoadGroup.cpp, line 238 ###!!! ASSERTION: Foreground URLs are active.: 'mForegroundCount == 0', file nsLoadGroup.cpp, line 239 ###!!! Break: at file nsLoadGroup.cpp, line 239 The count (and mForegroundCount) is 1. My guess is that there's a race condition where items are being added to the mChannels container while nsLoadGroup::Cancel is running (deleting items). I wonder if the OnStopNotification could be involved? I notice there's a comment about it. Just a WAG (wild-assed-guess). Easily repeatable.

setting bug status to New

AFAIK this is not a harmful assestion but to rpotts for comments.

*** This bug has been marked as a duplicate of 26295 ***

VERIFIED/dupe