There's three entries in about:Config with *shadow* involved, in the form ;border:1px...shadow...;. Maybe what you need is just set 1px to 0px - or more aggressively, eliminate the border entry.

Make copies of the CSS strings first, of course.

Let us know if it helped.

Sorry, but I don't have any entry in about:config with *shadow* here.

Can you copy past your settings for me to test them ?

Thanks

You would probably have to use a userChrome.css file to get rid of the shadows. They are probably box-shadows. The name of the element might be this: #main-window[tabsintitlebar] or just #titlebar.

here's the names and values - no strings attached, pls:)

downbar.style.db_progressStack max-width:135px;max-height:20px;min-height:20px;border:1px solid threeDShadow;-moz-border-radius:2px;margin-top:1px;margin-bottom:1px;margin-left:2px;margin-right:1px;padding:0px;

downbar.style.db_notdoneHbox background-color:#A3A3A3;max-width:135px;max-height:20px;min-height:20px;background-image:url(chrome://downbar/skin/whiteToTransGrad.png);-moz-border-radius:2px;border:1px solid threeDShadow;margin-top:1px;margin-bottom:1px;margin-left:2px;margin-right:1px;padding-top:0px;padding-bottom:0px;padding-left:3px;padding-right:0px;

downbar.style.db_finishedHbox background-color:#89AFDB;max-width:135px;max-height:20px;min-height:20px;background-image:url(chrome://downbar/skin/whiteToTransGrad.png);-moz-border-radius:2px;border:1px solid threeDShadow;margin-top:1px;margin-bottom:1px;margin-left:2px;margin-right:1px;padding-top:0px;padding-bottom:0px;padding-left:3px;padding-right:0px;