diff --git a/install.sh b/install.sh
index 91d771b..5d8e373 100755
--- a/install.sh
+++ b/install.sh
@@ -195,16 +195,47 @@ install_vscode_extension() {
         return 1
     fi
 
-    local root_flags=""
+    info "Installing Kilo Code extension ($VSCODE_EXTENSION)..."
+
+    # 1. Install for current user (no custom --user-data-dir so it lands in standard location)
+    "$bin" --install-extension "$VSCODE_EXTENSION" --force || {
+        warn "Marketplace failed, trying OpenVSX..."
+        "$bin" --install-extension "https://open-vsx.org/extension/kilocode/kilo-code" --force || warn "Extension install failed for current user."
+    }
+
+    # 2. If root, also install for every regular user with a home directory
     if [ "$EUID" -eq 0 ]; then
-        root_flags="--no-sandbox --user-data-dir=/tmp/vscode-root"
+        local ext_dir="/usr/share/code/resources/app/extensions"
+        [ -d "$ext_dir" ] || ext_dir="/usr/share/vscode/resources/app/extensions"
+        [ -d "$ext_dir" ] || ext_dir=""
+
+        for user_home in /home/*; do
+            [ -d "$user_home" ] || continue
+            local user_name
+            user_name=$(basename "$user_home")
+            # Only real users with uid >= 1000
+            local user_uid
+            user_uid=$(id -u "$user_name" 2>/dev/null || echo 0)
+            [ "$user_uid" -ge 1000 ] || continue
+
+            info "Installing Kilo Code extension for user: $user_name ..."
+            su - "$user_name" -c "$bin --install-extension $VSCODE_EXTENSION --force" || {
+                warn "Marketplace failed for $user_name, trying OpenVSX..."
+                su - "$user_name" -c "$bin --install-extension https://open-vsx.org/extension/kilocode/kilo-code --force" || warn "Extension install failed for $user_name."
+            }
+        done
+
+        # 3. Try system-wide install (copy into VS Code's bundled extensions)
+        if [ -n "$ext_dir" ] && [ -d "$ext_dir" ]; then
+            local current_user_ext
+            current_user_ext=$(ls -d "$HOME/.vscode/extensions/kilocode.kilo-code-"* 2>/dev/null | head -1)
+            if [ -n "$current_user_ext" ] && [ ! -d "$ext_dir/kilocode.kilo-code" ]; then
+                info "Copying extension to system-wide directory..."
+                cp -r "$current_user_ext" "$ext_dir/" && ok "System-wide extension installed" || warn "System-wide copy failed (permissions)."
+            fi
+        fi
     fi
 
-    info "Installing Kilo Code extension ($VSCODE_EXTENSION)..."
-    "$bin" $root_flags --install-extension "$VSCODE_EXTENSION" --force || {
-        warn "Extension install via marketplace failed, trying OpenVSX..."
-        "$bin" $root_flags --install-extension "https://open-vsx.org/extension/kilocode/kilo-code" --force || warn "Extension install failed. Install manually from Extensions panel."
-    }
     ok "Kilo Code extension installed"
 }
 
@@ -241,16 +272,15 @@ print_summary() {
     echo "========================================"
     local vscode_ver="N/A"
     if command -v code &>/dev/null; then
-        if [ "$EUID" -eq 0 ]; then
-            vscode_ver=$(code --no-sandbox --user-data-dir=/tmp/vscode-root --version 2>/dev/null | head -1 || echo "VS Code (root)")
-        else
-            vscode_ver=$(code --version 2>/dev/null | head -1 || echo "VS Code")
-        fi
+        vscode_ver=$(code --version 2>/dev/null | head -1 || echo "VS Code")
     elif command -v codium &>/dev/null; then
         vscode_ver=$(codium --version 2>/dev/null | head -1 || echo "VSCodium")
     fi
     ok "VS Code:     $vscode_ver"
     ok "Kilo Ext:    $VSCODE_EXTENSION"
+    if [ "$EUID" -eq 0 ]; then
+        ok "Kilo Users:  root + all regular users (/home/*)"
+    fi
     ok "Node:        $(node --version 2>/dev/null || echo 'N/A')"
     ok "Bun:         $(bun --version 2>/dev/null || echo 'N/A')"
     ok "Docker:      $(docker --version 2>/dev/null || echo 'N/A')"
@@ -261,6 +291,11 @@ print_summary() {
     echo "  cd $INSTALL_DIR"
     echo "  code ."
     echo ""
+    if [ "$EUID" -eq 0 ]; then
+        echo "  For root GUI sessions, if sandbox errors:"
+        echo "  code --no-sandbox ."
+        echo ""
+    fi
     if [ "$dist" != "unknown" ] && ! id -nG "$USER" | grep -qw docker; then
         warn "Docker group change requires re-login. Run: newgrp docker"
     fi