[+] Added ability to configure actions for downloads command, hotkey (Ctrl+J) and “Show All Downloads” button (#10
[+] Added workaround for line between Navigation and Bookmarks toolbars (extensions.downloadPanelTweaker.fixWrongTabsOnTopAttribute
[x] Fixed: download panel width option doesn't work with NASA Night Launch
[*] Improved startup performance.
[x] Correctly set small progress bar height.
[+] Added ability to not remove finished downloads from panel (extensions.downloadPanelTweaker.dontRemoveFinishedDownloads
preference + see defaults/preferences/prefs.js
for some hidden preferences) (#5
[+] Added very compact style for downloads list (#7
[*] Improved styles for downloads list.
[+] Added “Clear Downloads” menu item to panel context menu (#8
[x] Correctly update download panel in Firefox 28+ (#13
[+] Hide option for browser.download.useToolkitUI
in Firefox 26+ (doesn't work anymore, see bug 845403
[+] Added ability to limit download panel height (#20
[+] Added Greek (el) locale, thanks to Grg68
(translation isn't complete, sorry).