diff --git a/application/palemoon/branding/shared/pref/uaoverrides.inc b/application/palemoon/branding/shared/pref/uaoverrides.inc
index 6476d89809..0a01dde3f7 100644
--- a/application/palemoon/branding/shared/pref/uaoverrides.inc
+++ b/application/palemoon/branding/shared/pref/uaoverrides.inc
@@ -63,6 +63,7 @@ pref("@GUAO_PREF@.twitter.com","Mozilla/5.0 (%OS_SLICE% rv:@GRE_VERSION@) @GRE_D
 pref("@GUAO_PREF@.humblebundle.com","Mozilla/5.0 (%OS_SLICE% rv:@GK_VERSION@) @GK_SLICE@ @FX_SLICE@ (Pale Moon)");
 pref("@GUAO_PREF@.privat24.ua","Mozilla/5.0 (%OS_SLICE% rv:38.0) @GK_SLICE@ Firefox/38.0");
 pref("@GUAO_PREF@.citi.com","Mozilla/5.0 (%OS_SLICE% rv:68.0) @GK_SLICE@ Firefox/68.0 SeaMonkey/2.53.12");
+pref("@GUAO_PREF@.facebook.com","Mozilla/5.0 (%OS_SLICE% rv:68.0) @GK_SLICE@ Firefox/68.0 @PM_SLICE@");
 pref("@GUAO_PREF@.netflix.com","Mozilla/5.0 (Windows NT 6.1; rv:45.9) @GK_SLICE@ Firefox/45.9");
 pref("@GUAO_PREF@.netflximg.net","Mozilla/5.0 (Windows NT 6.1; rv:45.9) @GK_SLICE@ Firefox/45.9");
 pref("@GUAO_PREF@.mewe.com", "Mozilla/5.0 (%OS_SLICE% rv:102.0) Gecko/20100101 Firefox/102.0");