From efbe29f3faa69282aad110b7da74f3c41f8971cf Mon Sep 17 00:00:00 2001
From: Ivan Molodetskikh <yalterz@gmail.com>
Date: Sun, 23 Nov 2025 11:39:43 +0300
Subject: wiki/FAQ: Mention Firefox 1 px border

---
 docs/wiki/FAQ.md | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/docs/wiki/FAQ.md b/docs/wiki/FAQ.md
index 3dd61867..125f65eb 100644
--- a/docs/wiki/FAQ.md
+++ b/docs/wiki/FAQ.md
@@ -142,3 +142,8 @@ profile {
 	output eDP-1 enable scale 1.25 position 1920,0
 }
 ```
+
+### Why does Firefox or Thunderbird have 1 px smaller border?
+
+They draw their own 1 px dark border around the window, which obscures one pixel of niri's border.
+If you don't like this, set the [`clip-to-geometry true` window rule](./Configuration:-Window-Rules.md#clip-to-geometry).
-- 
cgit