diff --git a/Userland/Libraries/LibWeb/CSS/StyleComputer.cpp b/Userland/Libraries/LibWeb/CSS/StyleComputer.cpp
index 123f3d98b1..8a07fea503 100644
--- a/Userland/Libraries/LibWeb/CSS/StyleComputer.cpp
+++ b/Userland/Libraries/LibWeb/CSS/StyleComputer.cpp
@@ -1393,7 +1393,7 @@ CSSPixels StyleComputer::parent_or_root_element_line_height(DOM::Element const*
     return computed_values->line_height(viewport_rect(), parent_font_metrics, root_font_metrics);
 }
 
-void StyleComputer::absolutize_values(StyleProperties& style, DOM::Element const* element, Optional<CSS::Selector::PseudoElement> pseudo_element) const
+ErrorOr<void> StyleComputer::absolutize_values(StyleProperties& style, DOM::Element const* element, Optional<CSS::Selector::PseudoElement> pseudo_element) const
 {
     auto parent_or_root_line_height = parent_or_root_element_line_height(element, pseudo_element);
 
@@ -1411,9 +1411,8 @@ void StyleComputer::absolutize_values(StyleProperties& style, DOM::Element const
     //       because most percentages are relative to containing block metrics.
     auto& line_height_value_slot = style.m_property_values[to_underlying(CSS::PropertyID::LineHeight)];
     if (line_height_value_slot && line_height_value_slot->is_percentage()) {
-        line_height_value_slot = LengthStyleValue::create(
-            Length::make_px(font_size * line_height_value_slot->as_percentage().percentage().as_fraction()))
-                                     .release_value_but_fixme_should_propagate_errors();
+        line_height_value_slot = TRY(LengthStyleValue::create(
+            Length::make_px(font_size * line_height_value_slot->as_percentage().percentage().as_fraction())));
     }
 
     auto line_height = style.line_height(viewport_rect(), font_metrics, root_font_metrics);
@@ -1421,14 +1420,15 @@ void StyleComputer::absolutize_values(StyleProperties& style, DOM::Element const
 
     // NOTE: line-height might be using lh which should be resolved against the parent line height (like we did here already)
     if (line_height_value_slot && line_height_value_slot->is_length())
-        line_height_value_slot = LengthStyleValue::create(Length::make_px(line_height)).release_value_but_fixme_should_propagate_errors();
+        line_height_value_slot = TRY(LengthStyleValue::create(Length::make_px(line_height)));
 
     for (size_t i = 0; i < style.m_property_values.size(); ++i) {
         auto& value_slot = style.m_property_values[i];
         if (!value_slot)
             continue;
-        value_slot = value_slot->absolutized(viewport_rect(), font_metrics, root_font_metrics);
+        value_slot = TRY(value_slot->absolutized(viewport_rect(), font_metrics, root_font_metrics));
     }
+    return {};
 }
 
 enum class BoxTypeTransformation {
@@ -1528,7 +1528,7 @@ NonnullRefPtr<StyleProperties> StyleComputer::create_document_style() const
     auto style = StyleProperties::create();
     compute_font(style, nullptr, {});
     compute_defaulted_values(style, nullptr, {});
-    absolutize_values(style, nullptr, {});
+    absolutize_values(style, nullptr, {}).release_value_but_fixme_should_propagate_errors();
     style->set_property(CSS::PropertyID::Width, CSS::LengthStyleValue::create(CSS::Length::make_px(viewport_rect().width())).release_value_but_fixme_should_propagate_errors());
     style->set_property(CSS::PropertyID::Height, CSS::LengthStyleValue::create(CSS::Length::make_px(viewport_rect().height())).release_value_but_fixme_should_propagate_errors());
     style->set_property(CSS::PropertyID::Display, CSS::DisplayStyleValue::create(CSS::Display::from_short(CSS::Display::Short::Block)).release_value_but_fixme_should_propagate_errors());
@@ -1562,7 +1562,7 @@ ErrorOr<RefPtr<StyleProperties>> StyleComputer::compute_style_impl(DOM::Element&
     compute_font(style, &element, pseudo_element);
 
     // 3. Absolutize values, turning font/viewport relative lengths into absolute lengths
-    absolutize_values(style, &element, pseudo_element);
+    TRY(absolutize_values(style, &element, pseudo_element));
 
     // 4. Default the values, applying inheritance and 'initial' as needed
     compute_defaulted_values(style, &element, pseudo_element);
diff --git a/Userland/Libraries/LibWeb/CSS/StyleComputer.h b/Userland/Libraries/LibWeb/CSS/StyleComputer.h
index 8625af30a5..64e97ce00f 100644
--- a/Userland/Libraries/LibWeb/CSS/StyleComputer.h
+++ b/Userland/Libraries/LibWeb/CSS/StyleComputer.h
@@ -89,7 +89,7 @@ private:
     ErrorOr<void> compute_cascaded_values(StyleProperties&, DOM::Element&, Optional<CSS::Selector::PseudoElement>, bool& did_match_any_pseudo_element_rules, ComputeStyleMode) const;
     void compute_font(StyleProperties&, DOM::Element const*, Optional<CSS::Selector::PseudoElement>) const;
     void compute_defaulted_values(StyleProperties&, DOM::Element const*, Optional<CSS::Selector::PseudoElement>) const;
-    void absolutize_values(StyleProperties&, DOM::Element const*, Optional<CSS::Selector::PseudoElement>) const;
+    ErrorOr<void> absolutize_values(StyleProperties&, DOM::Element const*, Optional<CSS::Selector::PseudoElement>) const;
     void transform_box_type_if_needed(StyleProperties&, DOM::Element const&, Optional<CSS::Selector::PseudoElement>) const;
 
     void compute_defaulted_property_value(StyleProperties&, DOM::Element const*, CSS::PropertyID, Optional<CSS::Selector::PseudoElement>) const;
diff --git a/Userland/Libraries/LibWeb/CSS/StyleValue.cpp b/Userland/Libraries/LibWeb/CSS/StyleValue.cpp
index 095071e4c7..9a2aaca5bf 100644
--- a/Userland/Libraries/LibWeb/CSS/StyleValue.cpp
+++ b/Userland/Libraries/LibWeb/CSS/StyleValue.cpp
@@ -352,7 +352,7 @@ StyleValueList const& StyleValue::as_value_list() const
     return static_cast<StyleValueList const&>(*this);
 }
 
-ValueComparingNonnullRefPtr<StyleValue const> StyleValue::absolutized(CSSPixelRect const&, Length::FontMetrics const&, Length::FontMetrics const&) const
+ErrorOr<ValueComparingNonnullRefPtr<StyleValue const>> StyleValue::absolutized(CSSPixelRect const&, Length::FontMetrics const&, Length::FontMetrics const&) const
 {
     return *this;
 }
diff --git a/Userland/Libraries/LibWeb/CSS/StyleValue.h b/Userland/Libraries/LibWeb/CSS/StyleValue.h
index ebce86421f..00074060c4 100644
--- a/Userland/Libraries/LibWeb/CSS/StyleValue.h
+++ b/Userland/Libraries/LibWeb/CSS/StyleValue.h
@@ -295,7 +295,7 @@ public:
     virtual bool has_number() const { return false; }
     virtual bool has_integer() const { return false; }
 
-    virtual ValueComparingNonnullRefPtr<StyleValue const> absolutized(CSSPixelRect const& viewport_rect, Length::FontMetrics const& font_metrics, Length::FontMetrics const& root_font_metrics) const;
+    virtual ErrorOr<ValueComparingNonnullRefPtr<StyleValue const>> absolutized(CSSPixelRect const& viewport_rect, Length::FontMetrics const& font_metrics, Length::FontMetrics const& root_font_metrics) const;
 
     virtual Color to_color(Optional<Layout::NodeWithStyle const&>) const { return {}; }
     ValueID to_identifier() const;
diff --git a/Userland/Libraries/LibWeb/CSS/StyleValues/BorderRadiusStyleValue.cpp b/Userland/Libraries/LibWeb/CSS/StyleValues/BorderRadiusStyleValue.cpp
index 1a06acc9de..030849788b 100644
--- a/Userland/Libraries/LibWeb/CSS/StyleValues/BorderRadiusStyleValue.cpp
+++ b/Userland/Libraries/LibWeb/CSS/StyleValues/BorderRadiusStyleValue.cpp
@@ -18,7 +18,7 @@ ErrorOr<String> BorderRadiusStyleValue::to_string() const
     return String::formatted("{} / {}", TRY(m_properties.horizontal_radius.to_string()), TRY(m_properties.vertical_radius.to_string()));
 }
 
-ValueComparingNonnullRefPtr<StyleValue const> BorderRadiusStyleValue::absolutized(CSSPixelRect const& viewport_rect, Length::FontMetrics const& font_metrics, Length::FontMetrics const& root_font_metrics) const
+ErrorOr<ValueComparingNonnullRefPtr<StyleValue const>> BorderRadiusStyleValue::absolutized(CSSPixelRect const& viewport_rect, Length::FontMetrics const& font_metrics, Length::FontMetrics const& root_font_metrics) const
 {
     if (m_properties.horizontal_radius.is_percentage() && m_properties.vertical_radius.is_percentage())
         return *this;
@@ -28,7 +28,7 @@ ValueComparingNonnullRefPtr<StyleValue const> BorderRadiusStyleValue::absolutize
         absolutized_horizontal_radius = m_properties.horizontal_radius.length().absolutized(viewport_rect, font_metrics, root_font_metrics);
     if (!m_properties.vertical_radius.is_percentage())
         absolutized_vertical_radius = m_properties.vertical_radius.length().absolutized(viewport_rect, font_metrics, root_font_metrics);
-    return BorderRadiusStyleValue::create(absolutized_horizontal_radius, absolutized_vertical_radius).release_value_but_fixme_should_propagate_errors();
+    return BorderRadiusStyleValue::create(absolutized_horizontal_radius, absolutized_vertical_radius);
 }
 
 }
diff --git a/Userland/Libraries/LibWeb/CSS/StyleValues/BorderRadiusStyleValue.h b/Userland/Libraries/LibWeb/CSS/StyleValues/BorderRadiusStyleValue.h
index 2287390ed5..1d28b4002e 100644
--- a/Userland/Libraries/LibWeb/CSS/StyleValues/BorderRadiusStyleValue.h
+++ b/Userland/Libraries/LibWeb/CSS/StyleValues/BorderRadiusStyleValue.h
@@ -38,7 +38,7 @@ private:
     {
     }
 
-    virtual ValueComparingNonnullRefPtr<StyleValue const> absolutized(CSSPixelRect const& viewport_rect, Length::FontMetrics const& font_metrics, Length::FontMetrics const& root_font_metrics) const override;
+    virtual ErrorOr<ValueComparingNonnullRefPtr<StyleValue const>> absolutized(CSSPixelRect const& viewport_rect, Length::FontMetrics const& font_metrics, Length::FontMetrics const& root_font_metrics) const override;
 
     struct Properties {
         bool is_elliptical;
diff --git a/Userland/Libraries/LibWeb/CSS/StyleValues/LengthStyleValue.cpp b/Userland/Libraries/LibWeb/CSS/StyleValues/LengthStyleValue.cpp
index 0442a4913f..e750edeba5 100644
--- a/Userland/Libraries/LibWeb/CSS/StyleValues/LengthStyleValue.cpp
+++ b/Userland/Libraries/LibWeb/CSS/StyleValues/LengthStyleValue.cpp
@@ -27,10 +27,10 @@ ErrorOr<ValueComparingNonnullRefPtr<LengthStyleValue>> LengthStyleValue::create(
     return adopt_nonnull_ref_or_enomem(new (nothrow) LengthStyleValue(length));
 }
 
-ValueComparingNonnullRefPtr<StyleValue const> LengthStyleValue::absolutized(CSSPixelRect const& viewport_rect, Length::FontMetrics const& font_metrics, Length::FontMetrics const& root_font_metrics) const
+ErrorOr<ValueComparingNonnullRefPtr<StyleValue const>> LengthStyleValue::absolutized(CSSPixelRect const& viewport_rect, Length::FontMetrics const& font_metrics, Length::FontMetrics const& root_font_metrics) const
 {
     if (auto length = m_length.absolutize(viewport_rect, font_metrics, root_font_metrics); length.has_value())
-        return LengthStyleValue::create(length.release_value()).release_value_but_fixme_should_propagate_errors();
+        return LengthStyleValue::create(length.release_value());
     return *this;
 }
 
diff --git a/Userland/Libraries/LibWeb/CSS/StyleValues/LengthStyleValue.h b/Userland/Libraries/LibWeb/CSS/StyleValues/LengthStyleValue.h
index 8fa8e3d54f..e305af7c12 100644
--- a/Userland/Libraries/LibWeb/CSS/StyleValues/LengthStyleValue.h
+++ b/Userland/Libraries/LibWeb/CSS/StyleValues/LengthStyleValue.h
@@ -23,7 +23,7 @@ public:
     virtual bool has_length() const override { return true; }
     virtual ErrorOr<String> to_string() const override { return m_length.to_string(); }
     virtual Length to_length() const override { return m_length; }
-    virtual ValueComparingNonnullRefPtr<StyleValue const> absolutized(CSSPixelRect const& viewport_rect, Length::FontMetrics const& font_metrics, Length::FontMetrics const& root_font_metrics) const override;
+    virtual ErrorOr<ValueComparingNonnullRefPtr<StyleValue const>> absolutized(CSSPixelRect const& viewport_rect, Length::FontMetrics const& font_metrics, Length::FontMetrics const& root_font_metrics) const override;
 
     bool properties_equal(LengthStyleValue const& other) const { return m_length == other.m_length; }
 
diff --git a/Userland/Libraries/LibWeb/CSS/StyleValues/ShadowStyleValue.cpp b/Userland/Libraries/LibWeb/CSS/StyleValues/ShadowStyleValue.cpp
index a6ccadf9eb..a94669dd46 100644
--- a/Userland/Libraries/LibWeb/CSS/StyleValues/ShadowStyleValue.cpp
+++ b/Userland/Libraries/LibWeb/CSS/StyleValues/ShadowStyleValue.cpp
@@ -20,13 +20,13 @@ ErrorOr<String> ShadowStyleValue::to_string() const
     return builder.to_string();
 }
 
-ValueComparingNonnullRefPtr<StyleValue const> ShadowStyleValue::absolutized(CSSPixelRect const& viewport_rect, Length::FontMetrics const& font_metrics, Length::FontMetrics const& root_font_metrics) const
+ErrorOr<ValueComparingNonnullRefPtr<StyleValue const>> ShadowStyleValue::absolutized(CSSPixelRect const& viewport_rect, Length::FontMetrics const& font_metrics, Length::FontMetrics const& root_font_metrics) const
 {
     auto absolutized_offset_x = m_properties.offset_x.absolutized(viewport_rect, font_metrics, root_font_metrics);
     auto absolutized_offset_y = m_properties.offset_y.absolutized(viewport_rect, font_metrics, root_font_metrics);
     auto absolutized_blur_radius = m_properties.blur_radius.absolutized(viewport_rect, font_metrics, root_font_metrics);
     auto absolutized_spread_distance = m_properties.spread_distance.absolutized(viewport_rect, font_metrics, root_font_metrics);
-    return ShadowStyleValue::create(m_properties.color, absolutized_offset_x, absolutized_offset_y, absolutized_blur_radius, absolutized_spread_distance, m_properties.placement).release_value_but_fixme_should_propagate_errors();
+    return ShadowStyleValue::create(m_properties.color, absolutized_offset_x, absolutized_offset_y, absolutized_blur_radius, absolutized_spread_distance, m_properties.placement);
 }
 
 }
diff --git a/Userland/Libraries/LibWeb/CSS/StyleValues/ShadowStyleValue.h b/Userland/Libraries/LibWeb/CSS/StyleValues/ShadowStyleValue.h
index e934e82490..4932e6951b 100644
--- a/Userland/Libraries/LibWeb/CSS/StyleValues/ShadowStyleValue.h
+++ b/Userland/Libraries/LibWeb/CSS/StyleValues/ShadowStyleValue.h
@@ -46,7 +46,7 @@ private:
     {
     }
 
-    virtual ValueComparingNonnullRefPtr<StyleValue const> absolutized(CSSPixelRect const& viewport_rect, Length::FontMetrics const& font_metrics, Length::FontMetrics const& root_font_metrics) const override;
+    virtual ErrorOr<ValueComparingNonnullRefPtr<StyleValue const>> absolutized(CSSPixelRect const& viewport_rect, Length::FontMetrics const& font_metrics, Length::FontMetrics const& root_font_metrics) const override;
 
     struct Properties {
         Color color;