User Agent: Mozilla/5.0 (Windows NT 6.2; WOW64; rv:26.0) Gecko/20100101 Firefox/26.0 (Beta/Release) Build ID: 20130826030203 Steps to reproduce: Doewnload Actual results: Only popup but no content and further actions Expected results: Worked in 26.0a1 some days ago, woks too in 24.0 beta.
Mozilla/5.0 (X11; Linux i686; rv:26.0) Gecko/20100101 Firefox/26.0 This issue regressed when Downloads.jsm was introduced instead of the old nsIDownloadManager API. Steps to reproduce: 1. Install the Download Manager Tweak add-on from https://addons.mozilla.org/en-US/firefox/addon/download-manager-tweak/?src=search 2. Restart the browser 3. Perform a download Expected result: the add-on's downloads panel opens when the download starts and shows the download progress (and other downloads previously made, if available) Actual result: the add-on's downloads panel doesn't open when the download starts. You can open it from the downloads indicator, but it doesn't show the downloads (it is empty) Note: the issue is not reproducible with August 5 Nightly (which doesn't have the Downloads.jsm landed), nor by turning the browser.download.useJSTransfer preference to false.
The developers have been notified.
Closing the old compatibility bug now that legacy extensions are not supported anymore.