I have Firefox set to "Ask whether to open or save files" not to Save files. This never happened before, but now Firefox is not giving me the option to open or save files, and automatically starts the download without giving me the box with both options. I get the message Opening in x amount of time in the "Display the progress of ongoing download" button, instead of the remaining time of download where the file doesn't open when the download is finished.

How can this be corrected? I have a feeling something happened in a new version of Firefox.