With the previous version of Firefox (with the old PDF reader) I used to open PDF article from physics journals (e.g. https://journals.aps.org/prl/pdf/10.1103/PhysRevLett.125.131101 ) and save them using cmd+C (on a Mac). The default name of the file used to be "PhysRevLett.125.131101.pdf" while now it's always "document.pdf", which is very inconvenient, since I have to manually rename the files before downloading. If I save the file by clicking on the download icon in the reader, I still get the same more informative filename (but I don't get to choose the location for the download). I'm wondering why the name of the file is not consistent between the two ways of saving documents. Is there a way to go back to the old behaviour (unlikely, I guess)? Anyway I'd like to suggest the developers to go back the old way of handling the file name, if there are no strong reasons for the change.