diff --git a/Libraries/LibWeb/CSS/CSSFontFaceRule.cpp b/Libraries/LibWeb/CSS/CSSFontFaceRule.cpp
index f53c0dee149..5f758712324 100644
--- a/Libraries/LibWeb/CSS/CSSFontFaceRule.cpp
+++ b/Libraries/LibWeb/CSS/CSSFontFaceRule.cpp
@@ -68,7 +68,7 @@ String CSSFontFaceRule::serialized() const
             if (source.local_or_url.has<URL::URL>()) {
                 serialize_a_url(builder, source.local_or_url.get<URL::URL>().to_string());
             } else {
-                builder.appendff("local({})", source.local_or_url.get<String>());
+                builder.appendff("local({})", source.local_or_url.get<FlyString>());
             }
 
             // NOTE: No spec currently exists for format()
diff --git a/Libraries/LibWeb/CSS/ParsedFontFace.h b/Libraries/LibWeb/CSS/ParsedFontFace.h
index 3fdfc3d98f6..dbf95b311b5 100644
--- a/Libraries/LibWeb/CSS/ParsedFontFace.h
+++ b/Libraries/LibWeb/CSS/ParsedFontFace.h
@@ -19,7 +19,7 @@ namespace Web::CSS {
 class ParsedFontFace {
 public:
     struct Source {
-        Variant<String, URL::URL> local_or_url;
+        Variant<FlyString, URL::URL> local_or_url;
         // FIXME: Do we need to keep this around, or is it only needed to discard unwanted formats during parsing?
         Optional<FlyString> format;
     };
diff --git a/Libraries/LibWeb/CSS/Parser/RuleParsing.cpp b/Libraries/LibWeb/CSS/Parser/RuleParsing.cpp
index 622929ba722..aa3c39fa16e 100644
--- a/Libraries/LibWeb/CSS/Parser/RuleParsing.cpp
+++ b/Libraries/LibWeb/CSS/Parser/RuleParsing.cpp
@@ -672,7 +672,7 @@ Vector<ParsedFontFace::Source> Parser::parse_font_face_src(TokenStream<T>& compo
             if (first.function().value.is_empty()) {
                 continue;
             }
-            supported_sources.empend(first.function().value.first().to_string(), Optional<FlyString> {});
+            supported_sources.empend(FlyString { first.function().value.first().to_string() }, Optional<FlyString> {});
             continue;
         }
 
diff --git a/Libraries/LibWeb/Dump.cpp b/Libraries/LibWeb/Dump.cpp
index bd01266c18e..54793304b92 100644
--- a/Libraries/LibWeb/Dump.cpp
+++ b/Libraries/LibWeb/Dump.cpp
@@ -715,7 +715,7 @@ void dump_font_face_rule(StringBuilder& builder, CSS::CSSFontFaceRule const& rul
         if (source.local_or_url.has<URL::URL>())
             builder.appendff("url={}, format={}\n", source.local_or_url.get<URL::URL>(), source.format.value_or("???"_string));
         else
-            builder.appendff("local={}\n", source.local_or_url.get<AK::String>());
+            builder.appendff("local={}\n", source.local_or_url.get<FlyString>());
     }
 
     indent(builder, indent_levels + 1);