diff --git a/betterbird.sh b/betterbird.sh
new file mode 100755
index 0000000..5d77898
--- /dev/null
+++ b/betterbird.sh
@@ -0,0 +1,70 @@
+#!/usr/bin/env bash
+set -euo pipefail
+
+SRC_DIR="$(cd "$(dirname "${BASH_SOURCE[0]}")" && pwd)"
+INSTALL_DIR="/opt/betterbird"
+
+echo "Installing Betterbird from $SRC_DIR to $INSTALL_DIR ..."
+
+sudo mkdir -p "$(dirname "$INSTALL_DIR")"
+sudo cp -r "$SRC_DIR" "$INSTALL_DIR"
+
+sudo ln -sf "$INSTALL_DIR/betterbird" /usr/local/bin/betterbird
+
+sudo tee /usr/share/applications/betterbird.desktop > /dev/null <<EOF
+[Desktop Entry]
+Name=Betterbird
+Comment=Betterbird Mail Client
+Exec=$INSTALL_DIR/betterbird %u
+Icon=$INSTALL_DIR/chrome/icons/default/default256.png
+Terminal=false
+Type=Application
+Categories=Network;Email;
+MimeType=x-scheme-handler/mailto;
+EOF
+
+sudo update-desktop-database /usr/share/applications 2>/dev/null || true
+
+# --- i3 + polybar tray icon fix ---
+#
+# Betterbird gates its tray-icon feature behind mail.minimizeToTray.supportedDesktops,
+# which defaults to "kde,gnome,pop:gnome,xfce,mate" and does not include i3. On top of
+# that, within the whitelist it defaults to a StatusNotifierItem (SNI/AppIndicator) tray
+# icon everywhere except "mate" -- but polybar's tray module only speaks the legacy
+# XEmbed protocol, and this session has no StatusNotifierWatcher, so an SNI icon has
+# nowhere to register.
+#
+# Fix: add "i3" to both prefs via user.js, which Betterbird force-applies at every
+# startup (unlike prefs.js, which Betterbird overwrites from its own in-memory state
+# and would silently drop a plain text edit).
+THUNDERBIRD_CONFIG_DIR="$HOME/.config/thunderbird"
+BB_PROFILE_DIR="$(find "$THUNDERBIRD_CONFIG_DIR" -maxdepth 1 -iname "*.default-default" -type d 2>/dev/null | head -1)"
+if [ -z "$BB_PROFILE_DIR" ]; then
+  BB_PROFILE_DIR="$(find "$THUNDERBIRD_CONFIG_DIR" -maxdepth 1 -iname "*.default*" -type d 2>/dev/null | head -1)"
+fi
+
+if [ -n "$BB_PROFILE_DIR" ]; then
+  echo "Applying i3/polybar tray icon fix to profile: $BB_PROFILE_DIR"
+  USER_JS="$BB_PROFILE_DIR/user.js"
+  touch "$USER_JS"
+  if ! grep -q "mail.minimizeToTray.supportedDesktops" "$USER_JS" 2>/dev/null; then
+    cat >> "$USER_JS" <<'EOF'
+
+// Betterbird gates its whole tray-icon feature behind a whitelist of
+// XDG_CURRENT_DESKTOP values; add i3 so the feature isn't disabled outright.
+user_pref("mail.minimizeToTray.supportedDesktops", "kde,gnome,pop:gnome,xfce,mate,i3");
+
+// Within the whitelist, Betterbird still defaults to a StatusNotifierItem
+// (SNI/AppIndicator) tray icon everywhere except "mate". polybar's tray
+// module only speaks the legacy XEmbed protocol, so force the legacy icon
+// for i3 too.
+user_pref("mail.systemTrayNoSniSupport", "mate,i3");
+EOF
+  else
+    echo "Tray icon fix already present in $USER_JS, skipping."
+  fi
+else
+  echo "No Betterbird profile found yet -- launch Betterbird once, then re-run this script to apply the i3/polybar tray icon fix."
+fi
+
+echo "Done. Launch with 'betterbird' or from your application menu."