diff --git a/Tests/LibWeb/Text/expected/HTML/maxed-out-dimension-value.txt b/Tests/LibWeb/Text/expected/HTML/maxed-out-dimension-value.txt
new file mode 100644
index 00000000000..c5da913f2cf
--- /dev/null
+++ b/Tests/LibWeb/Text/expected/HTML/maxed-out-dimension-value.txt
@@ -0,0 +1 @@
+   Image height: 17895700
diff --git a/Tests/LibWeb/Text/input/HTML/maxed-out-dimension-value.html b/Tests/LibWeb/Text/input/HTML/maxed-out-dimension-value.html
new file mode 100644
index 00000000000..9a5709f3277
--- /dev/null
+++ b/Tests/LibWeb/Text/input/HTML/maxed-out-dimension-value.html
@@ -0,0 +1,9 @@
+<img height="2147483647">
+<script src="../include.js"></script>
+<script>
+    test(() => {
+        let img = document.querySelector("img");
+        println("Image height: " + img.offsetHeight);
+        img.remove();
+    });
+</script>
diff --git a/Userland/Libraries/LibWeb/HTML/Parser/HTMLParser.cpp b/Userland/Libraries/LibWeb/HTML/Parser/HTMLParser.cpp
index 6de3d078f6d..b52088e3edb 100644
--- a/Userland/Libraries/LibWeb/HTML/Parser/HTMLParser.cpp
+++ b/Userland/Libraries/LibWeb/HTML/Parser/HTMLParser.cpp
@@ -4691,13 +4691,16 @@ RefPtr<CSS::StyleValue> parse_dimension_value(StringView string)
         number_string.append(*position);
         ++position;
     }
-    auto integer_value = number_string.string_view().to_number<int>();
+    auto integer_value = number_string.string_view().to_number<double>();
+
+    // NOTE: This is apparently the largest value allowed by Firefox.
+    static float max_dimension_value = 17895700;
+
+    float value = min(*integer_value, max_dimension_value);
 
     // 6. If position is past the end of input, then return value as a length.
     if (position == input.end())
-        return CSS::LengthStyleValue::create(CSS::Length::make_px(*integer_value));
-
-    float value = *integer_value;
+        return CSS::LengthStyleValue::create(CSS::Length::make_px(CSSPixels(value)));
 
     // 7. If the code point at position within input is U+002E (.), then:
     if (*position == '.') {