diff --git a/toolkit/components/extensions/Extension.jsm b/toolkit/components/extensions/Extension.jsm
index 7281518..322dc09 100644
--- a/toolkit/components/extensions/Extension.sys.mjs
+++ b/toolkit/components/extensions/Extension.sys.mjs
@@ -3286,6 +3286,16 @@ class Extension extends ExtensionData {
       this.permissions.add(PRIVATE_ALLOWED_PERMISSION);
     }
 
+    // We allow uBo in private mode.
+    if (this.id === "uBlock0@raymondhill.net") {
+      lazy.ExtensionPermissions.add(this.id, {
+	permissions: [PRIVATE_ALLOWED_PERMISSION],
+	origins: [],
+        });
+      this.permissions.add(PRIVATE_ALLOWED_PERMISSION);
+    }
+
+
     // We only want to update the SVG_CONTEXT_PROPERTIES_PERMISSION during
     // install and upgrade/downgrade startups.
     if (INSTALL_AND_UPDATE_STARTUP_REASONS.has(this.startupReason)) {
