diff --git a/__init__.py b/__init__.py
index d62c39a..363518c 100644
--- a/__init__.py
+++ b/__init__.py
@@ -163,7 +163,10 @@ def __init__(self):
                 self.firefox_data_dir = Path.home() / "Library" / "Application Support" / "Firefox"
                 self.firefox_icon_factory = lambda: Icon.fileType("/Applications/Firefox.app")
             case "Linux":
-                self.firefox_data_dir = Path.home() / ".mozilla" / "firefox"
+                # Try XDG-compliant location first, fallback to legacy path
+                xdg_path = Path.home() / ".config" / "mozilla" / "firefox"
+                legacy_path = Path.home() / ".mozilla" / "firefox"
+                self.firefox_data_dir = xdg_path if xdg_path.exists() else legacy_path
                 self.firefox_icon_factory = lambda: Icon.theme("firefox")
             case _:
                 raise NotImplementedError(f"Unsupported platform: {platform.system()}")