System/Firefox hangs for several seconds when download manager window is supposed to open on Win 7 64 (FF 3.5.6)




8 years ago
7 years ago


(Reporter: Bill M. Green, Unassigned)


3.5 Branch
Windows 7

Firefox Tracking Flags

(Not tracked)


(Whiteboard: [CLOSEME 2011-05-30])



8 years ago
User-Agent:       Mozilla/5.0 (Windows; U; Windows NT 5.1; de; rv: Gecko/20091201 Firefox/3.5.6
Build Identifier: Mozilla/5.0 (Windows; U; Windows NT 5.1; de; rv: Gecko/20091201 Firefox/3.5.6

Pre-requisites: In preferences the download manager windows is selected to appear as soon as a download starts.

When trying to download the DL manager window appears and FireFox hangs for several seconds. It is unusable while it hangs. Happens with FF 3.5.6 in Win 7 64 Ultimate while this works flawlessly in XP Pro 32.

De-selecting the opening of the download manager window in prefs solves this problem and the FF does not hang at the start of the download. No matter if list is empty or if files are already in the download list.

Reproducible: Always

Steps to Reproduce:
1. Try to download file while the download manager window is set to be automatically opened when downloading in preferences.
Actual Results:  
The system freezes for several seconds / FireFox hangs and is not usable.

Does not happen in XP 32 with 3.5.6 and FireFox does NOT hang if you de-select the download manager windows in preferences.

The list is empty so it is not an error connect to a huge number of files in the download manager list. But it could be connected or similar to this bug: 508875.


8 years ago
Version: unspecified → 3.5 Branch

Comment 1

8 years ago
Also, if you move the download window it causes firefox to stop responding for several seconds. The window will freeze in Windows, and sometimes the cursor will attach to the title bar (ie it'll be dragging when the mouse button is up) after a temporary freeze.

The freezing is bad enough performance that several coworkers have expressed interest in using a new browser. Will pass on the fix suggested above.

Using Firefox 3.6.x on Windows Vista 64 or Windows 7 64

Comment 2

7 years ago
The suggested solution does not solve the problem fully. After following the suggestion, I could solve it. Then I tried to open the download window to cancel a download. After that irrespective of whether I have download window open or irrepsective of whether I have "open automatically" option in prefs, FF freezes. This has become more pronounced after the latest update of 3.6.5 and 3.6.6.

I have been a firefox user since 2006 and a mozilla user since 2002. I too use Thunderbird since 2006. But with TB 3.0 and FF present version, I am feeling a great urge to move away since my work is getting affected. Even the earlier versions (prelim ones) of FF /TB / Mozilla suite were not resulting in problems like this.

Comment 3

7 years ago
I too am using WIn 7 64bit with FF 3.6.6
Reporter, are you still seeing this issue with Firefox 4.0.1 or later in safe mode or a fresh profile? If not, please close. These links can help you in your testing.
Whiteboard: [CLOSEME 2011-05-30]
No reply, INCOMPLETE. Please retest with Firefox 4 or later and a new profile ( Also, ensure you have the most up to date graphics drivers, operating system updates, and plugin versions (flash, java, etc). If you continue to see this issue with the newest Firefox and a new profile, then please comment on this bug.
Last Resolved: 7 years ago
Resolution: --- → INCOMPLETE
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