diff --git a/AK/ByteBuffer.h b/AK/ByteBuffer.h
index 3bf92f6374b..aedae598720 100644
--- a/AK/ByteBuffer.h
+++ b/AK/ByteBuffer.h
@@ -147,14 +147,14 @@ public:
 #    pragma GCC diagnostic pop
 #endif
 
-    [[nodiscard]] Bytes bytes()
+    [[nodiscard]] Bytes bytes() LIFETIME_BOUND
     {
         return { data(), size() };
     }
-    [[nodiscard]] ReadonlyBytes bytes() const { return { data(), size() }; }
+    [[nodiscard]] ReadonlyBytes bytes() const LIFETIME_BOUND { return { data(), size() }; }
 
-    [[nodiscard]] AK::Bytes span() { return { data(), size() }; }
-    [[nodiscard]] AK::ReadonlyBytes span() const { return { data(), size() }; }
+    [[nodiscard]] AK::Bytes span() LIFETIME_BOUND { return { data(), size() }; }
+    [[nodiscard]] AK::ReadonlyBytes span() const LIFETIME_BOUND { return { data(), size() }; }
 
     [[nodiscard]] u8* offset_pointer(size_t offset) { return data() + offset; }
     [[nodiscard]] u8 const* offset_pointer(size_t offset) const { return data() + offset; }
@@ -243,7 +243,7 @@ public:
     }
 
     /// Like get_bytes_for_writing, but crashes if allocation fails.
-    Bytes must_get_bytes_for_writing(size_t length)
+    Bytes must_get_bytes_for_writing(size_t length) LIFETIME_BOUND
     {
         return MUST(get_bytes_for_writing(length));
     }
@@ -306,8 +306,8 @@ public:
         __builtin_memset(data(), 0, m_size);
     }
 
-    operator Bytes() { return bytes(); }
-    operator ReadonlyBytes() const { return bytes(); }
+    operator Bytes() LIFETIME_BOUND { return bytes(); }
+    operator ReadonlyBytes() const LIFETIME_BOUND { return bytes(); }
 
     ALWAYS_INLINE size_t capacity() const { return m_inline ? inline_capacity : m_outline_capacity; }
     ALWAYS_INLINE bool is_inline() const { return m_inline; }
diff --git a/AK/ByteString.h b/AK/ByteString.h
index 21cbfe65f27..09756f574ed 100644
--- a/AK/ByteString.h
+++ b/AK/ByteString.h
@@ -175,7 +175,7 @@ public:
     using SearchDirection = StringUtils::SearchDirection;
     [[nodiscard]] Optional<size_t> find_any_of(StringView needles, SearchDirection direction = SearchDirection::Forward) const { return StringUtils::find_any_of(*this, needles, direction); }
 
-    [[nodiscard]] StringView find_last_split_view(char separator) const& { return view().find_last_split_view(separator); }
+    [[nodiscard]] StringView find_last_split_view(char separator) const& LIFETIME_BOUND { return view().find_last_split_view(separator); }
     [[nodiscard]] StringView find_last_split_view(char separator) const&& = delete;
 
     [[nodiscard]] ByteString substring(size_t start, size_t length) const;
@@ -194,7 +194,7 @@ public:
 
     [[nodiscard]] bool copy_characters_to_buffer(char* buffer, size_t buffer_size) const;
 
-    [[nodiscard]] ALWAYS_INLINE ReadonlyBytes bytes() const& { return m_impl->bytes(); }
+    [[nodiscard]] ALWAYS_INLINE ReadonlyBytes bytes() const& LIFETIME_BOUND { return m_impl->bytes(); }
     [[nodiscard]] ALWAYS_INLINE ReadonlyBytes bytes() const&& = delete;
 
     [[nodiscard]] ALWAYS_INLINE char const& operator[](size_t i) const
@@ -283,7 +283,7 @@ public:
         return vformatted(fmtstr.view(), variadic_format_parameters);
     }
 
-    [[nodiscard]] StringView view() const& { return { characters(), length() }; }
+    [[nodiscard]] StringView view() const& LIFETIME_BOUND { return { characters(), length() }; }
     [[nodiscard]] StringView view() const&& = delete;
 
     [[nodiscard]] ByteString replace(StringView needle, StringView replacement, ReplaceMode replace_mode = ReplaceMode::All) const { return StringUtils::replace(*this, needle, replacement, replace_mode); }
diff --git a/AK/ByteStringImpl.h b/AK/ByteStringImpl.h
index 484de6e9187..ed368264bdd 100644
--- a/AK/ByteStringImpl.h
+++ b/AK/ByteStringImpl.h
@@ -42,8 +42,8 @@ public:
     // Includes NUL-terminator.
     char const* characters() const { return &m_inline_buffer[0]; }
 
-    ALWAYS_INLINE ReadonlyBytes bytes() const { return { characters(), length() }; }
-    ALWAYS_INLINE StringView view() const { return { characters(), length() }; }
+    ALWAYS_INLINE ReadonlyBytes bytes() const LIFETIME_BOUND { return { characters(), length() }; }
+    ALWAYS_INLINE StringView view() const LIFETIME_BOUND { return { characters(), length() }; }
 
     char const& operator[](size_t i) const
     {
diff --git a/AK/FlyString.h b/AK/FlyString.h
index ef0c2575145..b941e129fcf 100644
--- a/AK/FlyString.h
+++ b/AK/FlyString.h
@@ -40,8 +40,8 @@ public:
     String to_string() const;
 
     [[nodiscard]] Utf8View code_points() const;
-    [[nodiscard]] ReadonlyBytes bytes() const { return m_data.bytes(); }
-    [[nodiscard]] StringView bytes_as_string_view() const { return m_data.bytes(); }
+    [[nodiscard]] ReadonlyBytes bytes() const LIFETIME_BOUND { return m_data.bytes(); }
+    [[nodiscard]] StringView bytes_as_string_view() const LIFETIME_BOUND { return m_data.bytes(); }
 
     [[nodiscard]] ALWAYS_INLINE bool operator==(FlyString const& other) const { return m_data.raw(Badge<FlyString> {}) == other.m_data.raw(Badge<FlyString> {}); }
     [[nodiscard]] bool operator==(String const& other) const { return m_data == other; }
diff --git a/AK/Function.h b/AK/Function.h
index 3f929da1391..b58067b75c9 100644
--- a/AK/Function.h
+++ b/AK/Function.h
@@ -100,7 +100,7 @@ public:
         clear(false);
     }
 
-    [[nodiscard]] ReadonlyBytes raw_capture_range() const
+    [[nodiscard]] ReadonlyBytes raw_capture_range() const LIFETIME_BOUND
     {
         if (!m_size)
             return {};
diff --git a/AK/LexicalPath.h b/AK/LexicalPath.h
index a3a57df6334..be80595325a 100644
--- a/AK/LexicalPath.h
+++ b/AK/LexicalPath.h
@@ -32,10 +32,10 @@ public:
 
     ByteString const& string() const { return m_string; }
 
-    StringView dirname() const { return m_dirname; }
-    StringView basename(StripExtension s = StripExtension::No) const { return s == StripExtension::No ? m_basename : m_title; }
-    StringView title() const { return m_title; }
-    StringView extension() const { return m_extension; }
+    StringView dirname() const LIFETIME_BOUND { return m_dirname; }
+    StringView basename(StripExtension s = StripExtension::No) const LIFETIME_BOUND { return s == StripExtension::No ? m_basename : m_title; }
+    StringView title() const LIFETIME_BOUND { return m_title; }
+    StringView extension() const LIFETIME_BOUND { return m_extension; }
 
     Vector<StringView> const& parts_view() const { return m_parts; }
     [[nodiscard]] Vector<ByteString> parts() const;
diff --git a/AK/Platform.h b/AK/Platform.h
index e0e08b4331c..1000e7f4724 100644
--- a/AK/Platform.h
+++ b/AK/Platform.h
@@ -256,6 +256,15 @@
 #    define AK_COMPACT_EMPTY_BASES
 #endif
 
+#if defined(LIFETIME_BOUND)
+#    undef LIFETIME_BOUND
+#endif
+#if defined(AK_COMPILER_CLANG)
+#    define LIFETIME_BOUND [[clang::lifetimebound]]
+#else
+#    define LIFETIME_BOUND
+#endif
+
 // GCC doesn't have __has_feature but clang does
 #ifndef __has_feature
 #    define __has_feature(...) 0
diff --git a/AK/SourceGenerator.h b/AK/SourceGenerator.h
index 367445eef16..27e5fe146de 100644
--- a/AK/SourceGenerator.h
+++ b/AK/SourceGenerator.h
@@ -68,7 +68,7 @@ public:
 
     [[nodiscard]] MappingType clone_mapping() const { return MUST(m_mapping.clone()); }
 
-    StringView as_string_view() const { return m_builder.string_view(); }
+    StringView as_string_view() const LIFETIME_BOUND { return m_builder.string_view(); }
 
     void append(StringView pattern)
     {
diff --git a/AK/String.h b/AK/String.h
index 6aa9ea51195..5e2f481ccf6 100644
--- a/AK/String.h
+++ b/AK/String.h
@@ -144,7 +144,7 @@ public:
     [[nodiscard]] bool is_empty() const { return byte_count() == 0; }
 
     // Returns a StringView covering the full length of the string. Note that iterating this will go byte-at-a-time, not code-point-at-a-time.
-    [[nodiscard]] StringView bytes_as_string_view() const& { return StringView(bytes()); }
+    [[nodiscard]] StringView bytes_as_string_view() const& LIFETIME_BOUND { return StringView(bytes()); }
     [[nodiscard]] StringView bytes_as_string_view() const&& = delete;
 
     [[nodiscard]] size_t count(StringView needle) const { return StringUtils::count(bytes_as_string_view(), needle); }
diff --git a/AK/StringBase.h b/AK/StringBase.h
index 55b8f8860e8..a1989b9df62 100644
--- a/AK/StringBase.h
+++ b/AK/StringBase.h
@@ -17,7 +17,7 @@ struct ShortString {
     static constexpr ShortString create_empty();
     static constexpr ShortString create_with_byte_count(size_t byte_count);
 
-    ReadonlyBytes bytes() const;
+    ReadonlyBytes bytes() const LIFETIME_BOUND;
     size_t byte_count() const;
 
     // NOTE: This is the byte count shifted left 1 step and or'ed with a 1 (the SHORT_STRING_FLAG)
@@ -71,7 +71,7 @@ public:
 
     // Returns the underlying UTF-8 encoded bytes.
     // NOTE: There is no guarantee about null-termination.
-    [[nodiscard]] ReadonlyBytes bytes() const;
+    [[nodiscard]] ReadonlyBytes bytes() const LIFETIME_BOUND;
     [[nodiscard]] u32 hash() const;
     [[nodiscard]] size_t byte_count() const;
     [[nodiscard]] ALWAYS_INLINE size_t length_in_code_units() const { return byte_count(); }
diff --git a/AK/StringData.h b/AK/StringData.h
index 47287ada731..51ea994815d 100644
--- a/AK/StringData.h
+++ b/AK/StringData.h
@@ -83,7 +83,7 @@ public:
     }
 
     // NOTE: There is no guarantee about null-termination.
-    ReadonlyBytes bytes() const
+    ReadonlyBytes bytes() const LIFETIME_BOUND
     {
         if (m_substring) {
             auto const& data = substring_data();
@@ -92,7 +92,7 @@ public:
         return { &m_bytes_or_substring_data[0], m_byte_count };
     }
 
-    StringView bytes_as_string_view() const { return { bytes() }; }
+    StringView bytes_as_string_view() const LIFETIME_BOUND { return { bytes() }; }
 
     bool operator==(StringData const& other) const
     {
diff --git a/AK/StringView.h b/AK/StringView.h
index 10f50d20f89..8cf3157f200 100644
--- a/AK/StringView.h
+++ b/AK/StringView.h
@@ -45,10 +45,10 @@ public:
     {
     }
 
-    StringView(ByteBuffer const&);
-    StringView(String const&);
-    StringView(FlyString const&);
-    StringView(ByteString const&);
+    StringView(LIFETIME_BOUND ByteBuffer const&);
+    StringView(LIFETIME_BOUND String const&);
+    StringView(LIFETIME_BOUND FlyString const&);
+    StringView(LIFETIME_BOUND ByteString const&);
 
     explicit StringView(ByteBuffer&&) = delete;
     explicit StringView(String&&) = delete;
diff --git a/AK/UFixedBigInt.h b/AK/UFixedBigInt.h
index 31cb65b6656..27f6271fd78 100644
--- a/AK/UFixedBigInt.h
+++ b/AK/UFixedBigInt.h
@@ -181,12 +181,12 @@ public:
         }
     }
 
-    Bytes bytes()
+    Bytes bytes() LIFETIME_BOUND
     {
         return Bytes(reinterpret_cast<u8*>(this), sizeof(Storage));
     }
 
-    ReadonlyBytes bytes() const
+    ReadonlyBytes bytes() const LIFETIME_BOUND
     {
         return ReadonlyBytes(reinterpret_cast<u8 const*>(this), sizeof(Storage));
     }
diff --git a/AK/Utf16FlyString.h b/AK/Utf16FlyString.h
index eeb43320baf..44b702c2abe 100644
--- a/AK/Utf16FlyString.h
+++ b/AK/Utf16FlyString.h
@@ -34,11 +34,11 @@ public:
 
     Utf16FlyString(Utf16String const&);
 
-    [[nodiscard]] ALWAYS_INLINE Utf16View view() const { return m_data.utf16_view(); }
+    [[nodiscard]] ALWAYS_INLINE Utf16View view() const LIFETIME_BOUND { return m_data.utf16_view(); }
 
     ALWAYS_INLINE explicit operator Utf16String() const { return to_utf16_string(); }
 
-    ALWAYS_INLINE operator Utf16View() const& { return view(); }
+    ALWAYS_INLINE operator Utf16View() const& LIFETIME_BOUND { return view(); }
     explicit operator Utf16View() const&& = delete;
 
     ALWAYS_INLINE Utf16String to_utf16_string() const
diff --git a/AK/Utf16StringBase.h b/AK/Utf16StringBase.h
index 5957bdb919f..8c1af29a513 100644
--- a/AK/Utf16StringBase.h
+++ b/AK/Utf16StringBase.h
@@ -53,7 +53,7 @@ public:
             destroy_string();
     }
 
-    ALWAYS_INLINE operator Utf16View() const& { return utf16_view(); }
+    ALWAYS_INLINE operator Utf16View() const& LIFETIME_BOUND { return utf16_view(); }
     explicit operator Utf16View() const&& = delete;
 
     [[nodiscard]] ALWAYS_INLINE String to_utf8(AllowLonelySurrogates allow_lonely_surrogates = AllowLonelySurrogates::Yes) const
@@ -71,7 +71,7 @@ public:
         return MUST(utf16_view().to_byte_string(allow_lonely_surrogates));
     }
 
-    [[nodiscard]] ALWAYS_INLINE StringView ascii_view() const&
+    [[nodiscard]] ALWAYS_INLINE StringView ascii_view() const& LIFETIME_BOUND
     {
         if (has_short_ascii_storage())
             return short_ascii_string_without_union_member_assertion().bytes();
@@ -81,7 +81,7 @@ public:
         return {};
     }
 
-    [[nodiscard]] ALWAYS_INLINE Utf16View utf16_view() const&
+    [[nodiscard]] ALWAYS_INLINE Utf16View utf16_view() const& LIFETIME_BOUND
     {
         if (has_short_ascii_storage())
             return Utf16View { ascii_view().characters_without_null_termination(), length_in_code_units() };
@@ -223,12 +223,12 @@ public:
     [[nodiscard]] ALWAYS_INLINE Utf16CodePointIterator begin() const { return utf16_view().begin(); }
     [[nodiscard]] ALWAYS_INLINE Utf16CodePointIterator end() const { return utf16_view().end(); }
 
-    [[nodiscard]] ALWAYS_INLINE Utf16View substring_view(size_t code_unit_offset, size_t code_unit_length) const
+    [[nodiscard]] ALWAYS_INLINE Utf16View substring_view(size_t code_unit_offset, size_t code_unit_length) const LIFETIME_BOUND
     {
         return utf16_view().substring_view(code_unit_offset, code_unit_length);
     }
 
-    [[nodiscard]] ALWAYS_INLINE Utf16View substring_view(size_t code_unit_offset) const
+    [[nodiscard]] ALWAYS_INLINE Utf16View substring_view(size_t code_unit_offset) const LIFETIME_BOUND
     {
         return utf16_view().substring_view(code_unit_offset);
     }
diff --git a/AK/Utf16StringData.h b/AK/Utf16StringData.h
index 6573c982143..350efa158a7 100644
--- a/AK/Utf16StringData.h
+++ b/AK/Utf16StringData.h
@@ -96,13 +96,13 @@ public:
         return m_length_in_code_points;
     }
 
-    [[nodiscard]] ALWAYS_INLINE StringView ascii_view() const
+    [[nodiscard]] ALWAYS_INLINE StringView ascii_view() const LIFETIME_BOUND
     {
         ASSERT(has_ascii_storage());
         return { m_ascii_data, length_in_code_units() };
     }
 
-    [[nodiscard]] ALWAYS_INLINE Utf16View utf16_view() const
+    [[nodiscard]] ALWAYS_INLINE Utf16View utf16_view() const LIFETIME_BOUND
     {
         if (has_ascii_storage())
             return { m_ascii_data, length_in_code_units() };
diff --git a/Libraries/LibCore/MappedFile.h b/Libraries/LibCore/MappedFile.h
index 9f70e27c4aa..45a80eb508e 100644
--- a/Libraries/LibCore/MappedFile.h
+++ b/Libraries/LibCore/MappedFile.h
@@ -30,7 +30,7 @@ public:
     // Non-stream APIs for using MappedFile as a simple POSIX API wrapper.
     void* data() { return m_data; }
     void const* data() const { return m_data; }
-    ReadonlyBytes bytes() const { return { m_data, m_size }; }
+    ReadonlyBytes bytes() const LIFETIME_BOUND { return { m_data, m_size }; }
 
 private:
     explicit MappedFile(void*, size_t, Mode);
diff --git a/Libraries/LibCrypto/ASN1/DER.h b/Libraries/LibCrypto/ASN1/DER.h
index cdbe5864c60..0a5b9d6eb17 100644
--- a/Libraries/LibCrypto/ASN1/DER.h
+++ b/Libraries/LibCrypto/ASN1/DER.h
@@ -317,7 +317,7 @@ public:
         m_buffer_stack.empend();
     }
 
-    ReadonlyBytes active_bytes() const { return m_buffer_stack.last().bytes(); }
+    ReadonlyBytes active_bytes() const LIFETIME_BOUND { return m_buffer_stack.last().bytes(); }
     ByteBuffer finish()
     {
         VERIFY(m_buffer_stack.size() == 1);
diff --git a/Libraries/LibCrypto/Hash/HashFunction.h b/Libraries/LibCrypto/Hash/HashFunction.h
index 7ca8d7b97b2..70ceaa8c037 100644
--- a/Libraries/LibCrypto/Hash/HashFunction.h
+++ b/Libraries/LibCrypto/Hash/HashFunction.h
@@ -22,7 +22,7 @@ struct Digest {
     [[nodiscard]] ALWAYS_INLINE u8 const* immutable_data() const { return data; }
     [[nodiscard]] ALWAYS_INLINE size_t data_length() const { return Size; }
 
-    [[nodiscard]] ALWAYS_INLINE ReadonlyBytes bytes() const { return { immutable_data(), data_length() }; }
+    [[nodiscard]] ALWAYS_INLINE ReadonlyBytes bytes() const LIFETIME_BOUND { return { immutable_data(), data_length() }; }
 
     [[nodiscard]] bool operator==(Digest const& other) const = default;
     [[nodiscard]] bool operator!=(Digest const& other) const = default;
diff --git a/Libraries/LibCrypto/Hash/HashManager.h b/Libraries/LibCrypto/Hash/HashManager.h
index fb9ac9777f3..2b99b2c3a46 100644
--- a/Libraries/LibCrypto/Hash/HashManager.h
+++ b/Libraries/LibCrypto/Hash/HashManager.h
@@ -75,7 +75,7 @@ struct MultiHashDigestVariant {
             [&](auto const& value) { return value.data_length(); });
     }
 
-    [[nodiscard]] ReadonlyBytes bytes() const
+    [[nodiscard]] ReadonlyBytes bytes() const LIFETIME_BOUND
     {
         return m_digest.visit(
             [&](Empty const&) -> ReadonlyBytes { VERIFY_NOT_REACHED(); },
diff --git a/Libraries/LibDNS/Message.h b/Libraries/LibDNS/Message.h
index 7f471d5b392..1719755d1cf 100644
--- a/Libraries/LibDNS/Message.h
+++ b/Libraries/LibDNS/Message.h
@@ -471,8 +471,8 @@ struct DNSKEY {
             return public_key[0];
         return static_cast<u16>(public_key[1]) | static_cast<u16>(public_key[2]) << 8;
     }
-    ReadonlyBytes public_key_rsa_exponent() const { return public_key.bytes().slice(1, public_key_rsa_exponent_length()); }
-    ReadonlyBytes public_key_rsa_modulus() const { return public_key.bytes().slice(1 + public_key_rsa_exponent_length()); }
+    ReadonlyBytes public_key_rsa_exponent() const LIFETIME_BOUND { return public_key.bytes().slice(1, public_key_rsa_exponent_length()); }
+    ReadonlyBytes public_key_rsa_modulus() const LIFETIME_BOUND { return public_key.bytes().slice(1 + public_key_rsa_exponent_length()); }
 
     constexpr static inline u16 FlagSecureEntryPoint = 0b1000000000000000;
     constexpr static inline u16 FlagZoneKey = 0b0100000000000000;
diff --git a/Libraries/LibGfx/Font/PathFontProvider.h b/Libraries/LibGfx/Font/PathFontProvider.h
index d14bc1cc1d8..9be1abbbb18 100644
--- a/Libraries/LibGfx/Font/PathFontProvider.h
+++ b/Libraries/LibGfx/Font/PathFontProvider.h
@@ -28,7 +28,7 @@ public:
 
     virtual RefPtr<Gfx::Font> get_font(FlyString const& family, float point_size, unsigned weight, unsigned width, unsigned slope) override;
     virtual void for_each_typeface_with_family_name(FlyString const& family_name, Function<void(Typeface const&)>) override;
-    virtual StringView name() const override { return m_name.bytes_as_string_view(); }
+    virtual StringView name() const LIFETIME_BOUND override { return m_name.bytes_as_string_view(); }
 
 private:
     HashMap<FlyString, Vector<NonnullRefPtr<Typeface>>, AK::ASCIICaseInsensitiveFlyStringTraits> m_typeface_by_family;
diff --git a/Libraries/LibGfx/Font/TypefaceSkia.h b/Libraries/LibGfx/Font/TypefaceSkia.h
index 7a04fe8da57..4133d2c23d6 100644
--- a/Libraries/LibGfx/Font/TypefaceSkia.h
+++ b/Libraries/LibGfx/Font/TypefaceSkia.h
@@ -24,7 +24,7 @@ public:
     virtual u16 width() const override;
     virtual u8 slope() const override;
 
-    virtual ReadonlyBytes buffer() const override { return m_buffer; }
+    virtual ReadonlyBytes buffer() const LIFETIME_BOUND override { return m_buffer; }
     virtual unsigned ttc_index() const override { return m_ttc_index; }
 
     SkTypeface const* sk_typeface() const;
diff --git a/Libraries/LibJS/Bytecode/BasicBlock.h b/Libraries/LibJS/Bytecode/BasicBlock.h
index d9e0ff4bf87..bafa520eeb3 100644
--- a/Libraries/LibJS/Bytecode/BasicBlock.h
+++ b/Libraries/LibJS/Bytecode/BasicBlock.h
@@ -31,7 +31,7 @@ public:
 
     u32 index() const { return m_index; }
 
-    ReadonlyBytes instruction_stream() const { return m_buffer.span(); }
+    ReadonlyBytes instruction_stream() const LIFETIME_BOUND { return m_buffer.span(); }
     u8* data() { return m_buffer.data(); }
     u8 const* data() const { return m_buffer.data(); }
     size_t size() const { return m_buffer.size(); }
diff --git a/Libraries/LibJS/Module.h b/Libraries/LibJS/Module.h
index b763c2bd35c..fa61b424e20 100644
--- a/Libraries/LibJS/Module.h
+++ b/Libraries/LibJS/Module.h
@@ -99,7 +99,7 @@ public:
     Realm& realm() { return *m_realm; }
     Realm const& realm() const { return *m_realm; }
 
-    StringView filename() const { return m_filename; }
+    StringView filename() const LIFETIME_BOUND { return m_filename; }
 
     GC::Ptr<ModuleEnvironment> environment() { return m_environment; }
 
diff --git a/Libraries/LibJS/Runtime/Intl/Collator.h b/Libraries/LibJS/Runtime/Intl/Collator.h
index d7b86f8ef61..58decc07ea6 100644
--- a/Libraries/LibJS/Runtime/Intl/Collator.h
+++ b/Libraries/LibJS/Runtime/Intl/Collator.h
@@ -29,15 +29,15 @@ public:
 
     Unicode::Usage usage() const { return m_usage; }
     void set_usage(StringView usage) { m_usage = Unicode::usage_from_string(usage); }
-    StringView usage_string() const { return Unicode::usage_to_string(m_usage); }
+    StringView usage_string() const LIFETIME_BOUND { return Unicode::usage_to_string(m_usage); }
 
     Unicode::Sensitivity sensitivity() const { return m_sensitivity; }
     void set_sensitivity(Unicode::Sensitivity sensitivity) { m_sensitivity = sensitivity; }
-    StringView sensitivity_string() const { return Unicode::sensitivity_to_string(m_sensitivity); }
+    StringView sensitivity_string() const LIFETIME_BOUND { return Unicode::sensitivity_to_string(m_sensitivity); }
 
     Unicode::CaseFirst case_first() const { return m_case_first; }
     void set_case_first(StringView case_first) { m_case_first = Unicode::case_first_from_string(case_first); }
-    StringView case_first_string() const { return Unicode::case_first_to_string(m_case_first); }
+    StringView case_first_string() const LIFETIME_BOUND { return Unicode::case_first_to_string(m_case_first); }
 
     String const& collation() const { return m_collation; }
     void set_collation(String collation) { m_collation = move(collation); }
diff --git a/Libraries/LibJS/Script.h b/Libraries/LibJS/Script.h
index 19dc04829a8..690d1de8944 100644
--- a/Libraries/LibJS/Script.h
+++ b/Libraries/LibJS/Script.h
@@ -44,7 +44,7 @@ public:
     Vector<ModuleWithSpecifier> const& loaded_modules() const { return m_loaded_modules; }
 
     HostDefined* host_defined() const { return m_host_defined; }
-    StringView filename() const { return m_filename; }
+    StringView filename() const LIFETIME_BOUND { return m_filename; }
 
 private:
     Script(Realm&, StringView filename, NonnullRefPtr<Program>, HostDefined* = nullptr);
diff --git a/Libraries/LibLine/Editor.h b/Libraries/LibLine/Editor.h
index cf0c752c7da..3f96c48657b 100644
--- a/Libraries/LibLine/Editor.h
+++ b/Libraries/LibLine/Editor.h
@@ -249,7 +249,7 @@ public:
 
     bool is_editing() const { return m_is_editing; }
 
-    Utf32View const buffer_view() const { return { m_buffer.data(), m_buffer.size() }; }
+    Utf32View const buffer_view() const LIFETIME_BOUND { return { m_buffer.data(), m_buffer.size() }; }
 
     auto prohibit_input()
     {
diff --git a/Libraries/LibLine/SuggestionManager.h b/Libraries/LibLine/SuggestionManager.h
index b18d4c7e79b..e3341a21177 100644
--- a/Libraries/LibLine/SuggestionManager.h
+++ b/Libraries/LibLine/SuggestionManager.h
@@ -56,11 +56,11 @@ public:
     size_t invariant_offset { 0 };
     bool allow_commit_without_listing { true };
 
-    Utf8View text_view() const { return text.code_points(); }
-    Utf8View trivia_view() const { return trailing_trivia.code_points(); }
-    Utf8View display_trivia_view() const { return display_trivia.code_points(); }
-    StringView text_string() const { return text.bytes_as_string_view(); }
-    StringView display_trivia_string() const { return display_trivia.bytes_as_string_view(); }
+    Utf8View text_view() const LIFETIME_BOUND { return text.code_points(); }
+    Utf8View trivia_view() const LIFETIME_BOUND { return trailing_trivia.code_points(); }
+    Utf8View display_trivia_view() const LIFETIME_BOUND { return display_trivia.code_points(); }
+    StringView text_string() const LIFETIME_BOUND { return text.bytes_as_string_view(); }
+    StringView display_trivia_string() const LIFETIME_BOUND { return display_trivia.bytes_as_string_view(); }
     bool is_valid { false };
 };
 
diff --git a/Libraries/LibMedia/Containers/Matroska/Document.h b/Libraries/LibMedia/Containers/Matroska/Document.h
index 182fc61d0e0..b86dc96c9d3 100644
--- a/Libraries/LibMedia/Containers/Matroska/Document.h
+++ b/Libraries/LibMedia/Containers/Matroska/Document.h
@@ -27,9 +27,9 @@ class SegmentInformation {
 public:
     u64 timestamp_scale() const { return m_timestamp_scale; }
     void set_timestamp_scale(u64 timestamp_scale) { m_timestamp_scale = timestamp_scale; }
-    Utf8View muxing_app() const { return Utf8View(m_muxing_app); }
+    Utf8View muxing_app() const LIFETIME_BOUND { return Utf8View(m_muxing_app); }
     void set_muxing_app(ByteString muxing_app) { m_muxing_app = move(muxing_app); }
-    Utf8View writing_app() const { return Utf8View(m_writing_app); }
+    Utf8View writing_app() const LIFETIME_BOUND { return Utf8View(m_writing_app); }
     void set_writing_app(ByteString writing_app) { m_writing_app = move(writing_app); }
     Optional<double> duration_unscaled() const { return m_duration_unscaled; }
     void set_duration_unscaled(double duration) { m_duration_unscaled.emplace(duration); }
@@ -120,7 +120,7 @@ public:
     void set_language(FlyString const& language) { m_language = language; }
     FlyString codec_id() const { return m_codec_id; }
     void set_codec_id(FlyString const& codec_id) { m_codec_id = codec_id; }
-    ReadonlyBytes codec_private_data() const { return m_codec_private_data.span(); }
+    ReadonlyBytes codec_private_data() const LIFETIME_BOUND { return m_codec_private_data.span(); }
     ErrorOr<void> set_codec_private_data(ReadonlyBytes codec_private_data)
     {
         m_codec_private_data = TRY(FixedArray<u8>::create(codec_private_data));
diff --git a/Libraries/LibMedia/DecoderError.h b/Libraries/LibMedia/DecoderError.h
index 84818359467..d05461fdac4 100644
--- a/Libraries/LibMedia/DecoderError.h
+++ b/Libraries/LibMedia/DecoderError.h
@@ -63,12 +63,12 @@ public:
     }
 
     DecoderErrorCategory category() const { return m_category; }
-    StringView description() const
+    StringView description() const LIFETIME_BOUND
     {
         return m_description.visit([](StringView x) { return x; }, [](ByteString const& x) { return x.view(); });
     }
     // For compatibility with AK::Error
-    StringView string_literal() const { return description(); }
+    StringView string_literal() const LIFETIME_BOUND { return description(); }
 
 private:
     template<OneOf<StringView, ByteString> T>
diff --git a/Libraries/LibSyntax/Document.h b/Libraries/LibSyntax/Document.h
index b759ad60d11..c1efabd9ff7 100644
--- a/Libraries/LibSyntax/Document.h
+++ b/Libraries/LibSyntax/Document.h
@@ -35,7 +35,7 @@ public:
 
     ByteString to_utf8() const;
 
-    Utf32View view() const { return { code_points(), length() }; }
+    Utf32View view() const LIFETIME_BOUND { return { code_points(), length() }; }
     u32 const* code_points() const { return m_text.data(); }
     size_t length() const { return m_text.size(); }
     bool set_text(Document&, StringView);
diff --git a/Libraries/LibWasm/Types.h b/Libraries/LibWasm/Types.h
index ec3bdfd9361..0a1824a6fe7 100644
--- a/Libraries/LibWasm/Types.h
+++ b/Libraries/LibWasm/Types.h
@@ -1084,7 +1084,7 @@ public:
 
     void set_validation_status(ValidationStatus status, Badge<Validator>) { set_validation_status(status); }
     ValidationStatus validation_status() const { return m_validation_status; }
-    StringView validation_error() const { return *m_validation_error; }
+    StringView validation_error() const LIFETIME_BOUND { return *m_validation_error; }
     void set_validation_error(ByteString error) { m_validation_error = move(error); }
 
     static ParseResult<NonnullRefPtr<Module>> parse(Stream& stream);
diff --git a/Libraries/LibWasm/Wasi.h b/Libraries/LibWasm/Wasi.h
index 9689fd6844a..1da615b0b71 100644
--- a/Libraries/LibWasm/Wasi.h
+++ b/Libraries/LibWasm/Wasi.h
@@ -84,8 +84,8 @@ public:
     }
 
     // This returns the internal representation. In this case, that is the value stored in little endian format.
-    constexpr Bytes bytes() { return Bytes { &m_value, sizeof(m_value) }; }
-    constexpr ReadonlyBytes bytes() const { return ReadonlyBytes { &m_value, sizeof(m_value) }; }
+    constexpr Bytes bytes() LIFETIME_BOUND { return Bytes { &m_value, sizeof(m_value) }; }
+    constexpr ReadonlyBytes bytes() const LIFETIME_BOUND { return ReadonlyBytes { &m_value, sizeof(m_value) }; }
 
     void serialize_into(Array<Bytes, 1> bytes) const;
     static LittleEndian read_from(Array<ReadonlyBytes, 1> const& bytes);
diff --git a/Libraries/LibWeb/CSS/StyleValues/AngleStyleValue.h b/Libraries/LibWeb/CSS/StyleValues/AngleStyleValue.h
index c76793f0468..a0dae8130c7 100644
--- a/Libraries/LibWeb/CSS/StyleValues/AngleStyleValue.h
+++ b/Libraries/LibWeb/CSS/StyleValues/AngleStyleValue.h
@@ -24,7 +24,7 @@ public:
 
     Angle const& angle() const { return m_angle; }
     virtual double raw_value() const override { return m_angle.raw_value(); }
-    virtual StringView unit_name() const override { return m_angle.unit_name(); }
+    virtual StringView unit_name() const LIFETIME_BOUND override { return m_angle.unit_name(); }
 
     virtual String to_string(SerializationMode) const override;
 
diff --git a/Libraries/LibWeb/CSS/StyleValues/FlexStyleValue.h b/Libraries/LibWeb/CSS/StyleValues/FlexStyleValue.h
index c0a85367878..bc32496a68c 100644
--- a/Libraries/LibWeb/CSS/StyleValues/FlexStyleValue.h
+++ b/Libraries/LibWeb/CSS/StyleValues/FlexStyleValue.h
@@ -21,7 +21,7 @@ public:
 
     Flex const& flex() const { return m_flex; }
     virtual double raw_value() const override { return m_flex.raw_value(); }
-    virtual StringView unit_name() const override { return m_flex.unit_name(); }
+    virtual StringView unit_name() const LIFETIME_BOUND override { return m_flex.unit_name(); }
 
     virtual String to_string(SerializationMode serialization_mode) const override { return m_flex.to_string(serialization_mode); }
 
diff --git a/Libraries/LibWeb/CSS/StyleValues/FrequencyStyleValue.h b/Libraries/LibWeb/CSS/StyleValues/FrequencyStyleValue.h
index 37a8c2f154c..83295b3e610 100644
--- a/Libraries/LibWeb/CSS/StyleValues/FrequencyStyleValue.h
+++ b/Libraries/LibWeb/CSS/StyleValues/FrequencyStyleValue.h
@@ -24,7 +24,7 @@ public:
 
     Frequency const& frequency() const { return m_frequency; }
     virtual double raw_value() const override { return m_frequency.raw_value(); }
-    virtual StringView unit_name() const override { return m_frequency.unit_name(); }
+    virtual StringView unit_name() const LIFETIME_BOUND override { return m_frequency.unit_name(); }
 
     virtual String to_string(SerializationMode serialization_mode) const override { return m_frequency.to_string(serialization_mode); }
 
diff --git a/Libraries/LibWeb/CSS/StyleValues/LengthStyleValue.h b/Libraries/LibWeb/CSS/StyleValues/LengthStyleValue.h
index 5439f494d08..a7cc5e7ffcb 100644
--- a/Libraries/LibWeb/CSS/StyleValues/LengthStyleValue.h
+++ b/Libraries/LibWeb/CSS/StyleValues/LengthStyleValue.h
@@ -22,7 +22,7 @@ public:
 
     Length const& length() const { return m_length; }
     virtual double raw_value() const override { return m_length.raw_value(); }
-    virtual StringView unit_name() const override { return m_length.unit_name(); }
+    virtual StringView unit_name() const LIFETIME_BOUND override { return m_length.unit_name(); }
 
     virtual String to_string(SerializationMode serialization_mode) const override { return m_length.to_string(serialization_mode); }
     virtual ValueComparingNonnullRefPtr<StyleValue const> absolutized(CSSPixelRect const& viewport_rect, Length::FontMetrics const& font_metrics, Length::FontMetrics const& root_font_metrics) const override;
diff --git a/Libraries/LibWeb/CSS/StyleValues/ResolutionStyleValue.h b/Libraries/LibWeb/CSS/StyleValues/ResolutionStyleValue.h
index 4a787db9c49..eb4d71f209c 100644
--- a/Libraries/LibWeb/CSS/StyleValues/ResolutionStyleValue.h
+++ b/Libraries/LibWeb/CSS/StyleValues/ResolutionStyleValue.h
@@ -21,7 +21,7 @@ public:
 
     Resolution const& resolution() const { return m_resolution; }
     virtual double raw_value() const override { return m_resolution.raw_value(); }
-    virtual StringView unit_name() const override { return m_resolution.unit_name(); }
+    virtual StringView unit_name() const LIFETIME_BOUND override { return m_resolution.unit_name(); }
 
     virtual String to_string(SerializationMode serialization_mode) const override { return m_resolution.to_string(serialization_mode); }
 
diff --git a/Libraries/LibWeb/CSS/StyleValues/TimeStyleValue.h b/Libraries/LibWeb/CSS/StyleValues/TimeStyleValue.h
index a9555bfa8a3..c4a3844ce1c 100644
--- a/Libraries/LibWeb/CSS/StyleValues/TimeStyleValue.h
+++ b/Libraries/LibWeb/CSS/StyleValues/TimeStyleValue.h
@@ -24,7 +24,7 @@ public:
 
     Time const& time() const { return m_time; }
     virtual double raw_value() const override { return m_time.raw_value(); }
-    virtual StringView unit_name() const override { return m_time.unit_name(); }
+    virtual StringView unit_name() const LIFETIME_BOUND override { return m_time.unit_name(); }
 
     virtual String to_string(SerializationMode serialization_mode) const override { return m_time.to_string(serialization_mode); }
 
diff --git a/Libraries/LibWeb/Fetch/Infrastructure/HTTP/Requests.h b/Libraries/LibWeb/Fetch/Infrastructure/HTTP/Requests.h
index 6ef48a7e5bf..dd99bcdb184 100644
--- a/Libraries/LibWeb/Fetch/Infrastructure/HTTP/Requests.h
+++ b/Libraries/LibWeb/Fetch/Infrastructure/HTTP/Requests.h
@@ -178,7 +178,7 @@ public:
 
     [[nodiscard]] static GC::Ref<Request> create(JS::VM&);
 
-    [[nodiscard]] ReadonlyBytes method() const { return m_method; }
+    [[nodiscard]] ReadonlyBytes method() const LIFETIME_BOUND { return m_method; }
     void set_method(ByteBuffer method) { m_method = move(method); }
 
     [[nodiscard]] bool local_urls_only() const { return m_local_urls_only; }
diff --git a/Libraries/LibWeb/Fetch/Infrastructure/HTTP/Responses.h b/Libraries/LibWeb/Fetch/Infrastructure/HTTP/Responses.h
index e4cea041fef..e3975c06f13 100644
--- a/Libraries/LibWeb/Fetch/Infrastructure/HTTP/Responses.h
+++ b/Libraries/LibWeb/Fetch/Infrastructure/HTTP/Responses.h
@@ -78,7 +78,7 @@ public:
     [[nodiscard]] virtual Status status() const { return m_status; }
     virtual void set_status(Status status) { m_status = status; }
 
-    [[nodiscard]] virtual ReadonlyBytes status_message() const { return m_status_message; }
+    [[nodiscard]] virtual ReadonlyBytes status_message() const LIFETIME_BOUND { return m_status_message; }
     virtual void set_status_message(ByteBuffer status_message) { m_status_message = move(status_message); }
 
     [[nodiscard]] virtual GC::Ref<HeaderList> header_list() const { return m_header_list; }
@@ -230,7 +230,7 @@ public:
     [[nodiscard]] virtual Status status() const override { return m_internal_response->status(); }
     virtual void set_status(Status status) override { m_internal_response->set_status(status); }
 
-    [[nodiscard]] virtual ReadonlyBytes status_message() const override { return m_internal_response->status_message(); }
+    [[nodiscard]] virtual ReadonlyBytes status_message() const LIFETIME_BOUND override { return m_internal_response->status_message(); }
     virtual void set_status_message(ByteBuffer status_message) override { m_internal_response->set_status_message(move(status_message)); }
 
     [[nodiscard]] virtual GC::Ref<HeaderList> header_list() const override { return m_internal_response->header_list(); }
@@ -317,7 +317,7 @@ public:
     [[nodiscard]] virtual Vector<URL::URL> const& url_list() const override { return m_url_list; }
     [[nodiscard]] virtual Vector<URL::URL>& url_list() override { return m_url_list; }
     [[nodiscard]] virtual Status status() const override { return 0; }
-    [[nodiscard]] virtual ReadonlyBytes status_message() const override { return {}; }
+    [[nodiscard]] virtual ReadonlyBytes status_message() const LIFETIME_BOUND override { return {}; }
     [[nodiscard]] virtual GC::Ref<HeaderList> header_list() const override { return m_header_list; }
     [[nodiscard]] virtual GC::Ptr<Body> body() const override { return nullptr; }
 
@@ -340,7 +340,7 @@ public:
 
     [[nodiscard]] virtual Type type() const override { return Type::OpaqueRedirect; }
     [[nodiscard]] virtual Status status() const override { return 0; }
-    [[nodiscard]] virtual ReadonlyBytes status_message() const override { return {}; }
+    [[nodiscard]] virtual ReadonlyBytes status_message() const LIFETIME_BOUND override { return {}; }
     [[nodiscard]] virtual GC::Ref<HeaderList> header_list() const override { return m_header_list; }
     [[nodiscard]] virtual GC::Ptr<Body> body() const override { return nullptr; }
 
diff --git a/Libraries/LibWeb/FileAPI/Blob.h b/Libraries/LibWeb/FileAPI/Blob.h
index 8d90718e194..cbe09f56a35 100644
--- a/Libraries/LibWeb/FileAPI/Blob.h
+++ b/Libraries/LibWeb/FileAPI/Blob.h
@@ -53,7 +53,7 @@ public:
     GC::Ref<WebIDL::Promise> array_buffer();
     GC::Ref<WebIDL::Promise> bytes();
 
-    ReadonlyBytes raw_bytes() const { return m_byte_buffer.bytes(); }
+    ReadonlyBytes raw_bytes() const LIFETIME_BOUND { return m_byte_buffer.bytes(); }
 
     GC::Ref<Streams::ReadableStream> get_stream();
 
diff --git a/Libraries/LibWeb/MimeSniff/Resource.h b/Libraries/LibWeb/MimeSniff/Resource.h
index 9b9c2bdfdc9..708540e803e 100644
--- a/Libraries/LibWeb/MimeSniff/Resource.h
+++ b/Libraries/LibWeb/MimeSniff/Resource.h
@@ -39,7 +39,7 @@ public:
     ~Resource();
 
     MimeType const& computed_mime_type() const { return m_computed_mime_type; }
-    ReadonlyBytes resource_header() const { return m_resource_header; }
+    ReadonlyBytes resource_header() const LIFETIME_BOUND { return m_resource_header; }
 
 private:
     Resource(ReadonlyBytes data, bool no_sniff, MimeType&& default_computed_mime_type);
diff --git a/Libraries/LibWebView/SourceHighlighter.h b/Libraries/LibWebView/SourceHighlighter.h
index 3344871e5b5..39a748f67c2 100644
--- a/Libraries/LibWebView/SourceHighlighter.h
+++ b/Libraries/LibWebView/SourceHighlighter.h
@@ -31,7 +31,7 @@ public:
     }
     virtual ~SourceDocument() = default;
 
-    StringView text() const { return m_source; }
+    StringView text() const LIFETIME_BOUND { return m_source; }
     size_t line_count() const { return m_lines.size(); }
 
     // ^ Syntax::Document