diff --git a/data/tiling-exceptions.ron b/data/tiling-exceptions.ron
index 8413a188..2065c489 100644
--- a/data/tiling-exceptions.ron
+++ b/data/tiling-exceptions.ron
@@ -49,4 +49,5 @@
 	(appid: "Tor Browser", titles: [".*"]),
 	(appid: "^.*?action=join.*$", titles: [".*"]),
 	(appid: "^(slack|com.slack.Slack)", titles: ["^.*?(Huddle Preview).*"]),
+	(appid: "^(thunderbird|org.mozilla.thunderbird)(-esr|_esr)*", titles: ["^(Write:).*"]),
 ]