I use a program at work in which I run a command that downloads two documents as PDF. Until today (May 22nd 2019) when doing this, each download would open a tab in an existing window of Firefox, and download. As of a few hours ago, there was an update, and now this does not work. It now instead opens one new window, downloads the file, then waits. Once I open the file and close that window, I get a new window that then downloads the second file. Once I open this file, and close that window, the program that I am using to get the PDFs will go back to the beginning screen. This would not be an issue, but for the fact that I must do this a good 40 times a day. I tried rolling back my firefox to the previous version, but could not find clear instructions on how to do this. Anyone have any ideas? If you need more detail, let me know.