Bugfix NO-TICKET Unblock v143.1 build compile error (#29510)

Fix bad merge (?) and add liquid glass check for iOS 26 Betas 1-3 to prevent a crash

Author: ih-codes

firefox-ios/Client/Frontend/Browser/Tabs/Views/CustomSelectorView/TabTraySelectorView.swift

@@ -58,10 +58,10 @@ class TabTraySelectorView: UIView,
 
     private lazy var visualEffectView: UIVisualEffectView = .build { view in
 #if canImport(FoundationModels)
-        if #available(iOS 26, *) {
+        if #available(iOS 26, *), !DefaultBrowserUtil.isRunningLiquidGlassEarlyBeta {
             view.effect = UIGlassEffect(style: .regular)
         } else {
-            return UIBlurEffect(style: .systemUltraThinMaterial)
+            view.effect = UIBlurEffect(style: .systemUltraThinMaterial)
         }
 #else
         view.effect = UIBlurEffect(style: .systemUltraThinMaterial)