Steps to reproduce: 1. Start a long/slow download. 2. Close the download manager (if it is open). 3. Close the last browser window. Result: warning telling me that exiting would cancel downloads. This is bad in the common cases: * If I know what the download is and want to keep downloading, I am now required to make at least two clicks: one to dismiss the dialog and another to close the browser window at some point. (I usually make another click to reset the browser window to my home page, or another three to open the download manager and close the browser window, in order to keep the browser window from distracting me.) * If I don't know what the download is, I have to open the Download Manager manually to find out. The dialog only saves time in the uncommon case that I know what the download is and want to cancel it at the same time I want to close the last browser window. I have never been in that situation -- I have never clicked the "cancel downloads" button in the dialog. A better behavior would be to open the download manager when I close the browser window. If I *then* try to close the download manager, Firefox could show the warning.
Depends on bug 240696? Right now, having only the Download Manager open doesn't sound like the happiest thing.
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