User Agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10_7_3) AppleWebKit/534.55.3 (KHTML, like Gecko) Version/5.1.5 Safari/534.55.3 Steps to reproduce: 1.Downloaded a file from .dmg file. 2.File automatically downloaded to "Downloads" folder 3.Tried to open the file from "Downloads" view from browser and the file opened successfully. 4.Clicked on option "Open Containing Folder" and the file is shown in Finder. 5.Manually deleted the .dmg from "Downloads" folder and cleared from trash too. 6.The file is still visible in downloads in browser and tried to open the file as before. Actual results: No warning/error message displayed mentioning, the file is not available to open. Same is the case when clicked "Open containing Folder" option. Expected results: A pop-up error message would nice to have to inform the user