de8bdb4b40
As suggested by :jamie, this patch causes focus to move to the item at the top of the list whenever the download panel is shown. In the event that the download panel is opened automatically because a new download has been started, this will have the effect of always bringing the new download directly to the attention of accessibility tools (because the panel itself also receives focus). Differential Revision: https://phabricator.services.mozilla.com/D133160