diff --git a/backends/imgui_impl_glfw.cpp b/backends/imgui_impl_glfw.cpp
index b47e01066a08..afe83b7470e6 100644
--- a/backends/imgui_impl_glfw.cpp
+++ b/backends/imgui_impl_glfw.cpp
@@ -20,6 +20,8 @@
 
 // CHANGELOG
 // (minor and older changes stripped away, please see git history for details)
+//  2023-01-18: Handle unsupported glfwGetVideoMode (c.f. Emscripten)
+//  2023-01-18: Inputs: Re-scale horizontal scroll events from Emscripten to be more similar to native.
 //  2023-XX-XX: Platform: Added support for multiple windows via the ImGuiPlatformIO interface.
 //  2023-01-04: Inputs: Fixed mods state on Linux when using Alt-GR text input (e.g. German keyboard layout), could lead to broken text input. Revert a 2022/01/17 change were we resumed using mods provided by GLFW, turns out they were faulty.
 //  2022-11-22: Perform a dummy glfwGetError() read to cancel missing names with glfwGetKeyName(). (#5908)
@@ -313,6 +315,11 @@ void ImGui_ImplGlfw_MouseButtonCallback(GLFWwindow* window, int button, int acti
 
 void ImGui_ImplGlfw_ScrollCallback(GLFWwindow* window, double xoffset, double yoffset)
 {
+#if defined(__EMSCRIPTEN__)
+    // Running under Emscripten, GLFW reports grossly mis-scaled (and flipped) x-scroll events.
+    xoffset /= -20.0f;
+#endif
+
     ImGui_ImplGlfw_Data* bd = ImGui_ImplGlfw_GetBackendData();
     if (bd->PrevUserCallbackScroll != nullptr && window == bd->Window)
         bd->PrevUserCallbackScroll(window, xoffset, yoffset);
@@ -765,6 +772,11 @@ static void ImGui_ImplGlfw_UpdateMonitors()
         int x, y;
         glfwGetMonitorPos(glfw_monitors[n], &x, &y);
         const GLFWvidmode* vid_mode = glfwGetVideoMode(glfw_monitors[n]);
+        if (vid_mode == NULL) { // Failed to get Video mode (e.g. Emscripten does not support this function)
+            bd->WantUpdateMonitors = false;
+            platform_io.Monitors.resize(0);
+            return;
+        }
         monitor.MainPos = monitor.WorkPos = ImVec2((float)x, (float)y);
         monitor.MainSize = monitor.WorkSize = ImVec2((float)vid_mode->width, (float)vid_mode->height);
 #if GLFW_HAS_MONITOR_WORK_AREA