Firefox 20.0.1 *constantly* crashing from any drag & drop action




Shell Integration
5 years ago
5 years ago


(Reporter: Lawrence, Unassigned)



20 Branch
Windows XP

Firefox Tracking Flags

(Not tracked)


(crash signature)



5 years ago
User Agent: Mozilla/5.0 (Windows NT 5.1; rv:20.0) Gecko/20100101 Firefox/20.0
Build ID: 20130409194949

Steps to reproduce:

Any drag & drop action seems to be causing FF to crash. I've had it happen in at least the following situations:

- Drag a tab to change position (when multiple tabs are open)
- Drag a tab from one window to another
- Drag a file into a FF window (i.e. when trying to add an attachment in google mail using drag and drop)
- Drag a URL into a separate window to try to open that url in that window
- Drag text selected in a text input field (i.e. while in a form, select text within an input type=text form element, then click to drag that text)
- Drag text selected in other elements (this has happened to me when using an online code editor (from Salesforce) ... normally you can select a block of code and drag it to a different place in the code)

In all cases FF crashes *immediately* at the click-to-drag (click and hold?) or immediate start of the drag -- there is no perceptible time between the click-to-drag action and the crash, however normal click-to-click (on a link or a tab for example) does not case FF to crash.

This happens in safe mode as well.

This started happening as soon as 20.0.1 was installed. Before this new version I had no trouble with drag & drop. Now it happens constantly throughout the day.

I've submitted numerous crash reports, one primary one (in case it's not automatically attached) is:

The most easily reproduced instance is the first one listed above - the drag a tab crash. Steps to reproduce are:

- Open FF (for me Google opens as my home page in a single tab)
- Click the '+' sign to open a new tab (opens empty)
- Click on the original tab (the one with Google in it) to drag it to be after the second tab

Actual results:

Firefox crashes as soon as the click-to-drag action takes place.

Expected results:

The drag should have happened.

Comment 1

5 years ago
You are the only user amongst 400M ones to crash with this signature (see ttps://|+UserCallWinProcCheckWow) or on dragging at least reported in Bugzilla. 

It's caused by HookDLL.dll, an unversioned DLL. Check for malware (see and report back.
You should have check out before reporting it.

(In reply to Lawrence from comment #0)
> in case it's not automatically attached
You need to click Report this bug in Firefox inside the crash report for that.
Severity: normal → critical
Crash Signature: [@ xul.dll@0xf7bf20 | UserCallWinProcCheckWow ]
Component: Untriaged → Shell Integration
Flags: needinfo?(lawrence.coffin)
Keywords: crash

Comment 2

5 years ago
Thanks Scoobidiver, that version of HookDLL.dll appears to be a .dll that comes with a tool called Virtual Dimension that I've used since 2008. After stopping and restarting Virtual Dimension, drag & drop in FF appears to be working now.
Last Resolved: 5 years ago
Flags: needinfo?(lawrence.coffin)
Resolution: --- → INVALID
You need to log in before you can comment on or make changes to this bug.