diff --git a/src/wp-content/themes/twentynineteen/sass/blocks/_blocks.scss b/src/wp-content/themes/twentynineteen/sass/blocks/_blocks.scss
index e4b31341fa..a7f215c984 100644
--- a/src/wp-content/themes/twentynineteen/sass/blocks/_blocks.scss
+++ b/src/wp-content/themes/twentynineteen/sass/blocks/_blocks.scss
@@ -339,6 +339,12 @@
 			line-height: 1;
 			font-weight: bold;
 			margin: 0 0.25em 0 0;
+
+			@-moz-document url-prefix()  {
+				& {
+					margin-top: 0.2em;
+				}
+			}
 		}
 	}
 
diff --git a/src/wp-content/themes/twentynineteen/style-editor.css b/src/wp-content/themes/twentynineteen/style-editor.css
index b1051e5bf6..4b79f5350b 100644
--- a/src/wp-content/themes/twentynineteen/style-editor.css
+++ b/src/wp-content/themes/twentynineteen/style-editor.css
@@ -836,6 +836,12 @@ figcaption,
   margin: 0 0.25em 0 0;
 }
 
+@-moz-document url-prefix() {
+  .wp-block-paragraph.has-drop-cap:not(:focus)::first-letter {
+    margin-top: 0.2em;
+  }
+}
+
 /** === Table === */
 .wp-block-table {
   font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "Roboto", "Oxygen", "Ubuntu", "Cantarell", "Fira Sans", "Droid Sans", "Helvetica Neue", sans-serif;
diff --git a/src/wp-content/themes/twentynineteen/style-editor.scss b/src/wp-content/themes/twentynineteen/style-editor.scss
index 921d0880de..58185578c9 100644
--- a/src/wp-content/themes/twentynineteen/style-editor.scss
+++ b/src/wp-content/themes/twentynineteen/style-editor.scss
@@ -236,6 +236,12 @@ figcaption,
 		line-height: 1;
 		font-weight: bold;
 		margin: 0 0.25em 0 0;
+
+		@-moz-document url-prefix()  {
+			& {
+				margin-top: 0.2em;
+			}
+		}
 	}
 }
 
diff --git a/src/wp-content/themes/twentynineteen/style.css b/src/wp-content/themes/twentynineteen/style.css
index 296f506d1e..dc99af1dd4 100644
--- a/src/wp-content/themes/twentynineteen/style.css
+++ b/src/wp-content/themes/twentynineteen/style.css
@@ -5651,6 +5651,12 @@ body.page .main-navigation {
   margin: 0 0.25em 0 0;
 }
 
+@-moz-document url-prefix() {
+  .entry .entry-content .has-drop-cap:not(:focus)::first-letter {
+    margin-top: 0.2em;
+  }
+}
+
 .entry .entry-content .wp-block-pullquote {
   border-color: transparent;
   border-width: 2px;