diff --git a/js/lib/ui.js b/js/lib/ui.js
index a835567..28c1b1d 100644
--- a/js/lib/ui.js
+++ b/js/lib/ui.js
@@ -235,7 +235,7 @@ function createAutoComplete(name, wrapper, options = {}) {
 		onchange: new Observer(),
 
 		get value() {
-			const v = this._selectedOptions.map((opt) => opt.value);
+			const v = Array.from(this._selectedOptions).map((opt) => opt.value);
 			return options.multiple ? v : v[0];
 		},
 		set value(values) {
diff --git a/js/lib/util.js b/js/lib/util.js
index c07ca2a..ef90c6b 100644
--- a/js/lib/util.js
+++ b/js/lib/util.js
@@ -307,8 +307,10 @@ function downloadCanvas(options = {}) {
 		? cropCanvas(options.canvas).canvas
 		: options.canvas;
 	if (croppedCanvas != null) {
-		link.href = croppedCanvas.toDataURL("image/png");
-		link.click();
+		croppedCanvas.toBlob((blob) => {
+			link.href = URL.createObjectURL(blob);
+			link.click();
+		});
 	}
 }