fix(build): disable LTO temporarily and enable PGO based on release settings

refactor(ui): remove unnecessary DOMContentLoaded listener from toolbar registration
fix(ui): trigger window resize event on closing watermark to recalculate layout
refactor(ui): improve animation structure for tab content in vertical tabs manager

configs/macos/mozconfig

@@ -7,8 +7,18 @@ export MOZ_MACBUNDLE_ID=${appId}
 export MOZ_MACBUNDLE_NAME="Zen Browser.app"
 
 # override LTO settings
-# TODO: Dont
+# TODO: Dont use LTO for now, it's causing a lot of issues
+export MOZ_LTO=cross,thin
+ac_add_options --enable-lto=cross,thin
 
+if test "$ZEN_RELEASE"; then
+  if test "$ZEN_GA_DISABLE_PGO"; then
+    export ZEN_DUMMY=1
+  else
+    export MOZ_PGO=1
+    ac_add_options MOZ_PGO=1
+  fi
+fi
 
 if test "$SURFER_COMPAT" = "x86_64"; then
     ac_add_options --target=x86_64-apple-darwin