From b43785de654f2130b01cf9dfc547cf1c403a7b04 Mon Sep 17 00:00:00 2001
From: doruk <dodoznq+github@gmail.com>
Date: Mon, 14 Sep 2026 02:33:21 +0300
Subject: [PATCH] gh-15387: Fix #writeToDom crash when mod has checkbox
 preferences (gh-15388)

---
 src/zen/mods/ZenMods.mjs | 24 +++++++++++++++---------
 1 file changed, 15 insertions(+), 9 deletions(-)

diff --git a/src/zen/mods/ZenMods.mjs b/src/zen/mods/ZenMods.mjs
index 11c002bfe..a836f483a 100644
--- a/src/zen/mods/ZenMods.mjs
+++ b/src/zen/mods/ZenMods.mjs
@@ -182,15 +182,21 @@ class nsZenMods extends nsZenPreloadedFeature {
       ({ enabled, preferences, name }) => ({
         enabled,
         sanitizedName: this.sanitizeModName(name),
-        prefs: preferences.map(({ property, type }) => ({
-          property,
-          type,
-          sanitizedProperty: property?.replaceAll(DOT_RE, "-"),
-          value:
-            enabled === undefined || enabled
-              ? Services.prefs.getStringPref(property, "")
-              : "",
-        })),
+        prefs: preferences.map(({ property, type }) => {
+          const isEnabled = enabled === undefined || enabled;
+          const getPref =
+            type === "checkbox"
+              ? Services.prefs.getBoolPref
+              : Services.prefs.getStringPref;
+          const fallback = type === "checkbox" ? false : "";
+
+          return {
+            property,
+            type,
+            sanitizedProperty: property?.replaceAll(DOT_RE, "-"),
+            value: isEnabled ? getPref(property, fallback) : fallback,
+          };
+        }),
       })
     );