From 03e3959a0fc9ae2a742ebaa7c84af465c5a4e70c Mon Sep 17 00:00:00 2001
From: Fedor <fedor@mail.ru>
Date: Sun, 7 Feb 2021 17:33:10 +0200
Subject: [PATCH] Handle errors when initializing print settings...

---
 toolkit/content/browser-content.js | 14 ++++++++++++--
 1 file changed, 12 insertions(+), 2 deletions(-)

diff --git a/toolkit/content/browser-content.js b/toolkit/content/browser-content.js
index 2276f8a0d..d6185c5dd 100644
--- a/toolkit/content/browser-content.js
+++ b/toolkit/content/browser-content.js
@@ -483,8 +483,18 @@ var Printing = {
         printSettings.printerName = PSSVC.defaultPrinterName;
       }
       // First get any defaults from the printer
-      PSSVC.initPrintSettingsFromPrinter(printSettings.printerName,
-                                         printSettings);
+      try {
+        PSSVC.initPrintSettingsFromPrinter(printSettings.printerName,
+                                           printSettings);
+      } catch(e) {
+        // The printer name specified was invalid or there was an O.S. error.
+        Components.utils.reportError("Invalid printer: " + printSettings.printerName);
+        Services.prefs.clearUserPref("print.print_printer");
+        // Try again with default
+        printSettings.printerName = PSSVC.defaultPrinterName;
+        PSSVC.initPrintSettingsFromPrinter(printSettings.printerName,
+                                           printSettings);
+      }
       // now augment them with any values from last time
       PSSVC.initPrintSettingsFromPrefs(printSettings, true,
                                        printSettings.kInitSaveAll);