If you go to the about:config page in Firefox by typing it in the address bar, you can change the print.tab_modal.enabled preference to false. I'm not sure if that preference will always be there, as it's not uncommon for these preferences that disable new features to be removed from Firefox after the older feature is no longer supported. However, this will (at least for this moment in time) give you back the regular Windows print dialog.

Could you elaborate on what issues it causes you? We know there is some work still to do on it, but it would be helpful to hear about concrete issues people have so that we can try to take these into account. (Especially since the ability to turn off that `print.tab_modal.enabled` option will be removed at some point.)

For me the new interface doesn't work. I do not have a printer installed and I use print to PDF on Linux. With the old interface this work properly, but the new interface gives an 'Uncaught (in promise) exception.

Exception { name: "NS_ERROR_FAILURE", message: "Component returned failure code: 0x80004005 (NS_ERROR_FAILURE) [nsIPrinterList.systemDefaultPrinterName]", result: 2147500037, filename: "chrome://global/content/print.js", lineNumber: 854, columnNumber: 0, data: null, stack: "getPrintDestinations@chrome://global/content/print.js:854:32\n", location: XPCWrappedNative_NoHelper }

Ah, thank you for that information. That looks like this line:

https://searchfox.org/mozilla-release/rev/bd293e54e69e84159520df1ac72fd9854d700522/toolkit/components/printing/content/print.js#854

Can you open an issue at https://bugzilla.mozilla.org/ for this, please? It should not be difficult to fix.

For me, it's a migraine trigger, and I've filed a bug report. Can't speak for the original poster.