From MozillaZine Knowledge Base
Some URLs use
Content-Disposition headers to tell browsers what to use for a filename when saving a file. This filename may not match the URL. When choosing “Save Link As...” from a link’s context menu, Mozilla must request the URL to find out the filename from a
Content-Disposition header. Since this is not as fast as merely using the URL itself to generate a filename, Mozilla will time out after a short time waiting for the headers. This preference determines that timeout.
Possible values and their effects
Number of milliseconds to wait when retrieving the filename from
Content-Disposition headers before resorting to the original URL’s filename. Default is 1000 (1 second).
First checked in
Has an effect in
- Firefox (nightly builds since 2008-04-03)