Download FDM 3.5 RC http://www.freedownloadmanager.org/bo.../viewtopic.php?f=1&t=15061

The latest bulid adds support for FF4

Or wait for the final release of FDM 3.5. (Don't know when that will be available)

Install flashgot (an addon for firefox) which will help you to download a file with any external download manager (including FDM).

Works Good tip Thanks

I have tried both the ideas above but once I've tried to install them I get a small box stating 'Create process failed code 740 ' FDM works fine still with Internet Explorer but since updating to firefox4 my FDM won't open .

Any ideas anyone ?

Still waiting patiently on a f.d.m - free download manager plugin that works with Firefox 4.

Have stuck with an old version of firefox until this becomes available..