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Lighthouse Mobile

· 0 checks — Mobile Lighthouse audit -- Performance, Accessibility, Best Practices, and SEO category breakdown.
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Detailed Report

Audit breakdown by category with detailed findings.

36

Performance

Insights

Remove large, duplicate JavaScript modules from bundles to reduce unnecessary bytes consumed by network activity.

Why this matters

Performance issues directly impact user engagement and conversion rates.

Polyfills and transforms enable older browsers to use new JavaScript features. However, many aren't necessary for modern browsers. Consider modifying your JavaScript build process to not transpile Baseline features, unless you know you must support older browsers. Learn why most sites can deploy ES6+ code without transpiling

Why this matters

Performance issues directly impact user engagement and conversion rates.

3rd party code can significantly impact load performance. Reduce and defer loading of 3rd party code to prioritize your page's content.

Why this matters

Performance issues directly impact user engagement and conversion rates.

A long cache lifetime can speed up repeat visits to your page. Learn more about caching.

Why this matters

Performance issues directly impact user engagement and conversion rates.

RequestCache TTLTransfer Size
cdn.cookielaw.org/scripttemplates/202604.1.0/otBannerSdk.js86400.0 s131.0 KiB
/sites/novartiscom/files/css/css_QXAvsP_9ka40oU06UbzMmrv3...1209600.0 s288.3 KiB
/sites/novartiscom/files/styles/cosmos_banner_half_image_...1209600.0 s192.2 KiB
/sites/novartiscom/files/js/js_RBDtWSKtcMyC24sM1Ge-XKAdIx...1209600.0 s183.8 KiB
/sites/novartiscom/files/styles/banner_gradient_half_imag...1209600.0 s155.4 KiB
/sites/novartiscom/files/styles/vertical_card/public/2026...1209600.0 s96.4 KiB
/sites/novartiscom/files/styles/cta_image/public/2026-01/...1209600.0 s95.4 KiB
/sites/novartiscom/files/styles/image_mega_menu/public/20...1209600.0 s61.6 KiB
/sites/novartiscom/files/styles/image_mega_menu/public/20...1209600.0 s57.5 KiB
/sites/novartiscom/files/styles/image_mega_menu/public/20...1209600.0 s55.9 KiB
cdn.cookielaw.org/consent/fe8dfb2c-2701-45db-8577-13675c68ed60/OtAutoBlock.js86400.0 s13.5 KiB
www.novartis.com/themes/custom/cosmos/fonts/VoltaModernDisplay-65Medium.otf1209600.0 s48.5 KiB
/sites/novartiscom/files/styles/vertical_card/public/2026...1209600.0 s48.3 KiB
/sites/novartiscom/files/css/css_0qKuUROEK8rPMa256eIE9Vs-...1209600.0 s48.3 KiB
/sites/novartiscom/files/styles/vertical_card/public/2026...1209600.0 s47.7 KiB
www.novartis.com/themes/custom/cosmos/fonts/VoltaModernDisplay-55Roman.otf1209600.0 s47.4 KiB
/beacon.min.js/v8c78df7c7c0f484497ecbca7046644da177152312...86400.0 s10.7 KiB
/sites/novartiscom/files/styles/vertical_card/public/2026...1209600.0 s39.6 KiB
/sites/novartiscom/files/styles/image_mega_menu/public/20...1209600.0 s37.2 KiB
cdn.cookielaw.org/scripttemplates/otSDKStub.js86400.0 s9.1 KiB
/sites/novartiscom/files/styles/cta_image/public/2025-09/...1209600.0 s36.1 KiB
/sites/novartiscom/files/styles/image_mega_menu/public/20...1209600.0 s33.5 KiB
/sites/novartiscom/files/styles/image_mega_menu/public/20...1209600.0 s33.0 KiB
/sites/novartiscom/files/styles/image_mega_menu/public/20...1209600.0 s32.8 KiB
script.crazyegg.com/pages/scripts/0058/0106.js300.0 s2.7 KiB
/logos/41bcd2e1-262c-4eea-ada5-7b59ad81de18/fe8dfb2c-2701...86400.0 s6.3 KiB
/sites/novartiscom/files/styles/image_mega_menu/public/20...1209600.0 s24.3 KiB
/sites/novartiscom/files/styles/image_mega_menu/public/20...1209600.0 s24.2 KiB
/sites/novartiscom/files/styles/cta_image/public/2025-09/...1209600.0 s19.7 KiB
cdn.cookielaw.org/logos/static/powered_by_logo.svg86400.0 s2.7 KiB
www.novartis.com/themes/custom/cosmos/fonts/cosmos_icons_v9.woff1209600.0 s8.3 KiB
/sites/novartiscom/files/css/css_20ha_3JzD0Ma-dHS2pBOHFmq...1209600.0 s4.6 KiB
www.novartis.com/themes/custom/cosmos/patterns/images/globe.svg1209600.0 s3.0 KiB
www.novartis.com/themes/custom/cosmos/logo.svg1209600.0 s1.7 KiB
/sites/novartiscom/files/css/css_kpVXoafu3J4M1GfxRIw8hYKC...1209600.0 s1.4 KiB
www.novartis.com/themes/custom/cosmos/mobile_logo.svg1209600.0 s719 B
www.novartis.com/modules/contrib/google_tag/js/gtag.js?tdwrnx1209600.0 s700 B
www.novartis.com/modules/contrib/google_tag/js/gtm.js?tdwrnx1209600.0 s649 B
www.novartis.com/themes/custom/cosmos/patterns/images/icon-close.svg1209600.0 s588 B
www.novartis.com/modules/contrib/cookiepro/js/cookiepro.js?tdwrnx1209600.0 s563 B
www.novartis.com/themes/custom/cosmos/patterns/images/chevron-down-white.svg1209600.0 s419 B
www.novartis.com/themes/custom/cosmos/patterns/images/icon-search-v2.svg1209600.0 s414 B
www.novartis.com/themes/custom/cosmos/patterns/images/icon-orange-next.svg1209600.0 s386 B
/sites/novartiscom/files/js/js_XxhNeXYR2zsyBLpDKl7qUQpBCS...1209600.0 s367 B
/sites/novartiscom/files/css/css_E7Hkz5J8CDjgNTBsaJsUhIJ7...1209600.0 s324 B

Your first network request is the most important. Reduce its latency by avoiding redirects, ensuring a fast server response, and enabling text compression.

Why this matters

Performance issues directly impact user engagement and conversion rates.

A forced reflow occurs when JavaScript queries geometric properties (such as offsetWidth) after styles have been invalidated by a change to the DOM state. This can result in poor performance. Learn more about forced reflows and possible mitigations.

Why this matters

Performance issues directly impact user engagement and conversion rates.

headings: [map[key:source label:Top function call valueType:source-location] map[granularity:1 key:reflowTime label:Total reflow time valueType:ms]]
items: [map[reflowTime:25.902 source:map[column:156 line:12 type:source-location url:https://www.novartis.com/sites/novartiscom/files/js/js_RBDtWSKtcMyC24sM1Ge-XKAdIxxptpPPSBX0HfqcIdg.js?scope=footer&delta=0&language=en&theme=cosmos&include=eJx1kmuOpDAMhC8UiDRa7WpPYxlwhzRJjGzDdN9-zPRjXpo_wfU5FYVyUEbLI4wsFPGj7is2TDTBKReCbS2MkzfqWsgIaKdmh_RdU7jb1HhcwKuFJH4WAVXJILczjcYSz9q7Bf68_Pv7H3RmMTCSCtRmbCPV42w-gc0EMwnDjpLRWVbdCLhB5TCQuQfosrLebulSI27GoNtQs_22JVEjwRIGZlMTXGFAkcwxFR6wdGrXklsKI_OSaRWOz8qZVtb4tD7AD-s7bbt2uXqKXcJSSK6PhhbP5SH2PBF3a8FrV7JamNDQhWc40Ix7ZtFAF_ODlzjJtmLp7zIk5uTTMUwx-fJd93jGy1dYQxuhYEubXwuUym0iTzLy1kyuz05Q8lHNgGuGI9vHC4i_8PD-N0B18MQXLLYJxvv3RsMrQaWEPuUtnlhq_0rdAbqDdCfhZtSmN6ZXBd0&0=tdwrnx urlProvider:network]]]
headings: [map[key:source label:Source valueType:source-location] map[granularity:1 key:reflowTime label:Total reflow time valueType:ms]]
items: [map[reflowTime:56.72 source:map[column:33818 line:268 type:source-location url:https://www.novartis.com/sites/novartiscom/files/js/js_RBDtWSKtcMyC24sM1Ge-XKAdIxxptpPPSBX0HfqcIdg.js?scope=footer&delta=0&language=en&theme=cosmos&include=eJx1kmuOpDAMhC8UiDRa7WpPYxlwhzRJjGzDdN9-zPRjXpo_wfU5FYVyUEbLI4wsFPGj7is2TDTBKReCbS2MkzfqWsgIaKdmh_RdU7jb1HhcwKuFJH4WAVXJILczjcYSz9q7Bf68_Pv7H3RmMTCSCtRmbCPV42w-gc0EMwnDjpLRWVbdCLhB5TCQuQfosrLebulSI27GoNtQs_22JVEjwRIGZlMTXGFAkcwxFR6wdGrXklsKI_OSaRWOz8qZVtb4tD7AD-s7bbt2uXqKXcJSSK6PhhbP5SH2PBF3a8FrV7JamNDQhWc40Ix7ZtFAF_ODlzjJtmLp7zIk5uTTMUwx-fJd93jGy1dYQxuhYEubXwuUym0iTzLy1kyuz05Q8lHNgGuGI9vHC4i_8PD-N0B18MQXLLYJxvv3RsMrQaWEPuUtnlhq_0rdAbqDdCfhZtSmN6ZXBd0&0=tdwrnx urlProvider:network]] map[reflowTime:8.547 source:map[column:120 line:249 type:source-location url:https://www.novartis.com/sites/novartiscom/files/js/js_RBDtWSKtcMyC24sM1Ge-XKAdIxxptpPPSBX0HfqcIdg.js?scope=footer&delta=0&language=en&theme=cosmos&include=eJx1kmuOpDAMhC8UiDRa7WpPYxlwhzRJjGzDdN9-zPRjXpo_wfU5FYVyUEbLI4wsFPGj7is2TDTBKReCbS2MkzfqWsgIaKdmh_RdU7jb1HhcwKuFJH4WAVXJILczjcYSz9q7Bf68_Pv7H3RmMTCSCtRmbCPV42w-gc0EMwnDjpLRWVbdCLhB5TCQuQfosrLebulSI27GoNtQs_22JVEjwRIGZlMTXGFAkcwxFR6wdGrXklsKI_OSaRWOz8qZVtb4tD7AD-s7bbt2uXqKXcJSSK6PhhbP5SH2PBF3a8FrV7JamNDQhWc40Ix7ZtFAF_ODlzjJtmLp7zIk5uTTMUwx-fJd93jGy1dYQxuhYEubXwuUym0iTzLy1kyuz05Q8lHNgGuGI9vHC4i_8PD-N0B18MQXLLYJxvv3RsMrQaWEPuUtnlhq_0rdAbqDdCfhZtSmN6ZXBd0&0=tdwrnx urlProvider:network]] map[reflowTime:0.259 source:map[column:73628 line:257 type:source-location url:https://www.novartis.com/sites/novartiscom/files/js/js_RBDtWSKtcMyC24sM1Ge-XKAdIxxptpPPSBX0HfqcIdg.js?scope=footer&delta=0&language=en&theme=cosmos&include=eJx1kmuOpDAMhC8UiDRa7WpPYxlwhzRJjGzDdN9-zPRjXpo_wfU5FYVyUEbLI4wsFPGj7is2TDTBKReCbS2MkzfqWsgIaKdmh_RdU7jb1HhcwKuFJH4WAVXJILczjcYSz9q7Bf68_Pv7H3RmMTCSCtRmbCPV42w-gc0EMwnDjpLRWVbdCLhB5TCQuQfosrLebulSI27GoNtQs_22JVEjwRIGZlMTXGFAkcwxFR6wdGrXklsKI_OSaRWOz8qZVtb4tD7AD-s7bbt2uXqKXcJSSK6PhhbP5SH2PBF3a8FrV7JamNDQhWc40Ix7ZtFAF_ODlzjJtmLp7zIk5uTTMUwx-fJd93jGy1dYQxuhYEubXwuUym0iTzLy1kyuz05Q8lHNgGuGI9vHC4i_8PD-N0B18MQXLLYJxvv3RsMrQaWEPuUtnlhq_0rdAbqDdCfhZtSmN6ZXBd0&0=tdwrnx urlProvider:network]] map[reflowTime:0.756 source:map[column:50335 line:2 type:source-location url:https://www.novartis.com/sites/novartiscom/files/js/js_RBDtWSKtcMyC24sM1Ge-XKAdIxxptpPPSBX0HfqcIdg.js?scope=footer&delta=0&language=en&theme=cosmos&include=eJx1kmuOpDAMhC8UiDRa7WpPYxlwhzRJjGzDdN9-zPRjXpo_wfU5FYVyUEbLI4wsFPGj7is2TDTBKReCbS2MkzfqWsgIaKdmh_RdU7jb1HhcwKuFJH4WAVXJILczjcYSz9q7Bf68_Pv7H3RmMTCSCtRmbCPV42w-gc0EMwnDjpLRWVbdCLhB5TCQuQfosrLebulSI27GoNtQs_22JVEjwRIGZlMTXGFAkcwxFR6wdGrXklsKI_OSaRWOz8qZVtb4tD7AD-s7bbt2uXqKXcJSSK6PhhbP5SH2PBF3a8FrV7JamNDQhWc40Ix7ZtFAF_ODlzjJtmLp7zIk5uTTMUwx-fJd93jGy1dYQxuhYEubXwuUym0iTzLy1kyuz05Q8lHNgGuGI9vHC4i_8PD-N0B18MQXLLYJxvv3RsMrQaWEPuUtnlhq_0rdAbqDdCfhZtSmN6ZXBd0&0=tdwrnx urlProvider:network]] map[reflowTime:0.463 source:map[column:50393 line:2 type:source-location url:https://www.novartis.com/sites/novartiscom/files/js/js_RBDtWSKtcMyC24sM1Ge-XKAdIxxptpPPSBX0HfqcIdg.js?scope=footer&delta=0&language=en&theme=cosmos&include=eJx1kmuOpDAMhC8UiDRa7WpPYxlwhzRJjGzDdN9-zPRjXpo_wfU5FYVyUEbLI4wsFPGj7is2TDTBKReCbS2MkzfqWsgIaKdmh_RdU7jb1HhcwKuFJH4WAVXJILczjcYSz9q7Bf68_Pv7H3RmMTCSCtRmbCPV42w-gc0EMwnDjpLRWVbdCLhB5TCQuQfosrLebulSI27GoNtQs_22JVEjwRIGZlMTXGFAkcwxFR6wdGrXklsKI_OSaRWOz8qZVtb4tD7AD-s7bbt2uXqKXcJSSK6PhhbP5SH2PBF3a8FrV7JamNDQhWc40Ix7ZtFAF_ODlzjJtmLp7zIk5uTTMUwx-fJd93jGy1dYQxuhYEubXwuUym0iTzLy1kyuz05Q8lHNgGuGI9vHC4i_8PD-N0B18MQXLLYJxvv3RsMrQaWEPuUtnlhq_0rdAbqDdCfhZtSmN6ZXBd0&0=tdwrnx urlProvider:network]] map[reflowTime:0.507 source:map[column:50457 line:2 type:source-location url:https://www.novartis.com/sites/novartiscom/files/js/js_RBDtWSKtcMyC24sM1Ge-XKAdIxxptpPPSBX0HfqcIdg.js?scope=footer&delta=0&language=en&theme=cosmos&include=eJx1kmuOpDAMhC8UiDRa7WpPYxlwhzRJjGzDdN9-zPRjXpo_wfU5FYVyUEbLI4wsFPGj7is2TDTBKReCbS2MkzfqWsgIaKdmh_RdU7jb1HhcwKuFJH4WAVXJILczjcYSz9q7Bf68_Pv7H3RmMTCSCtRmbCPV42w-gc0EMwnDjpLRWVbdCLhB5TCQuQfosrLebulSI27GoNtQs_22JVEjwRIGZlMTXGFAkcwxFR6wdGrXklsKI_OSaRWOz8qZVtb4tD7AD-s7bbt2uXqKXcJSSK6PhhbP5SH2PBF3a8FrV7JamNDQhWc40Ix7ZtFAF_ODlzjJtmLp7zIk5uTTMUwx-fJd93jGy1dYQxuhYEubXwuUym0iTzLy1kyuz05Q8lHNgGuGI9vHC4i_8PD-N0B18MQXLLYJxvv3RsMrQaWEPuUtnlhq_0rdAbqDdCfhZtSmN6ZXBd0&0=tdwrnx urlProvider:network]] map[reflowTime:1.802 source:map[column:49637 line:2 type:source-location url:https://www.novartis.com/sites/novartiscom/files/js/js_RBDtWSKtcMyC24sM1Ge-XKAdIxxptpPPSBX0HfqcIdg.js?scope=footer&delta=0&language=en&theme=cosmos&include=eJx1kmuOpDAMhC8UiDRa7WpPYxlwhzRJjGzDdN9-zPRjXpo_wfU5FYVyUEbLI4wsFPGj7is2TDTBKReCbS2MkzfqWsgIaKdmh_RdU7jb1HhcwKuFJH4WAVXJILczjcYSz9q7Bf68_Pv7H3RmMTCSCtRmbCPV42w-gc0EMwnDjpLRWVbdCLhB5TCQuQfosrLebulSI27GoNtQs_22JVEjwRIGZlMTXGFAkcwxFR6wdGrXklsKI_OSaRWOz8qZVtb4tD7AD-s7bbt2uXqKXcJSSK6PhhbP5SH2PBF3a8FrV7JamNDQhWc40Ix7ZtFAF_ODlzjJtmLp7zIk5uTTMUwx-fJd93jGy1dYQxuhYEubXwuUym0iTzLy1kyuz05Q8lHNgGuGI9vHC4i_8PD-N0B18MQXLLYJxvv3RsMrQaWEPuUtnlhq_0rdAbqDdCfhZtSmN6ZXBd0&0=tdwrnx urlProvider:network]] map[reflowTime:21.663 source:map[column:49615 line:2 type:source-location url:https://www.novartis.com/sites/novartiscom/files/js/js_RBDtWSKtcMyC24sM1Ge-XKAdIxxptpPPSBX0HfqcIdg.js?scope=footer&delta=0&language=en&theme=cosmos&include=eJx1kmuOpDAMhC8UiDRa7WpPYxlwhzRJjGzDdN9-zPRjXpo_wfU5FYVyUEbLI4wsFPGj7is2TDTBKReCbS2MkzfqWsgIaKdmh_RdU7jb1HhcwKuFJH4WAVXJILczjcYSz9q7Bf68_Pv7H3RmMTCSCtRmbCPV42w-gc0EMwnDjpLRWVbdCLhB5TCQuQfosrLebulSI27GoNtQs_22JVEjwRIGZlMTXGFAkcwxFR6wdGrXklsKI_OSaRWOz8qZVtb4tD7AD-s7bbt2uXqKXcJSSK6PhhbP5SH2PBF3a8FrV7JamNDQhWc40Ix7ZtFAF_ODlzjJtmLp7zIk5uTTMUwx-fJd93jGy1dYQxuhYEubXwuUym0iTzLy1kyuz05Q8lHNgGuGI9vHC4i_8PD-N0B18MQXLLYJxvv3RsMrQaWEPuUtnlhq_0rdAbqDdCfhZtSmN6ZXBd0&0=tdwrnx urlProvider:network]] map[reflowTime:0.757 source:map[column:51395 line:2 type:source-location url:https://www.novartis.com/sites/novartiscom/files/js/js_RBDtWSKtcMyC24sM1Ge-XKAdIxxptpPPSBX0HfqcIdg.js?scope=footer&delta=0&language=en&theme=cosmos&include=eJx1kmuOpDAMhC8UiDRa7WpPYxlwhzRJjGzDdN9-zPRjXpo_wfU5FYVyUEbLI4wsFPGj7is2TDTBKReCbS2MkzfqWsgIaKdmh_RdU7jb1HhcwKuFJH4WAVXJILczjcYSz9q7Bf68_Pv7H3RmMTCSCtRmbCPV42w-gc0EMwnDjpLRWVbdCLhB5TCQuQfosrLebulSI27GoNtQs_22JVEjwRIGZlMTXGFAkcwxFR6wdGrXklsKI_OSaRWOz8qZVtb4tD7AD-s7bbt2uXqKXcJSSK6PhhbP5SH2PBF3a8FrV7JamNDQhWc40Ix7ZtFAF_ODlzjJtmLp7zIk5uTTMUwx-fJd93jGy1dYQxuhYEubXwuUym0iTzLy1kyuz05Q8lHNgGuGI9vHC4i_8PD-N0B18MQXLLYJxvv3RsMrQaWEPuUtnlhq_0rdAbqDdCfhZtSmN6ZXBd0&0=tdwrnx urlProvider:network]] map[reflowTime:0.859 source:map[type:text value:[unattributed]]] map[reflowTime:0.506 source:map[column:13400 line:257 type:source-location url:https://www.novartis.com/sites/novartiscom/files/js/js_RBDtWSKtcMyC24sM1Ge-XKAdIxxptpPPSBX0HfqcIdg.js?scope=footer&delta=0&language=en&theme=cosmos&include=eJx1kmuOpDAMhC8UiDRa7WpPYxlwhzRJjGzDdN9-zPRjXpo_wfU5FYVyUEbLI4wsFPGj7is2TDTBKReCbS2MkzfqWsgIaKdmh_RdU7jb1HhcwKuFJH4WAVXJILczjcYSz9q7Bf68_Pv7H3RmMTCSCtRmbCPV42w-gc0EMwnDjpLRWVbdCLhB5TCQuQfosrLebulSI27GoNtQs_22JVEjwRIGZlMTXGFAkcwxFR6wdGrXklsKI_OSaRWOz8qZVtb4tD7AD-s7bbt2uXqKXcJSSK6PhhbP5SH2PBF3a8FrV7JamNDQhWc40Ix7ZtFAF_ODlzjJtmLp7zIk5uTTMUwx-fJd93jGy1dYQxuhYEubXwuUym0iTzLy1kyuz05Q8lHNgGuGI9vHC4i_8PD-N0B18MQXLLYJxvv3RsMrQaWEPuUtnlhq_0rdAbqDdCfhZtSmN6ZXBd0&0=tdwrnx urlProvider:network]] map[reflowTime:0.119 source:map[column:85537 line:2 type:source-location url:https://www.novartis.com/sites/novartiscom/files/js/js_RBDtWSKtcMyC24sM1Ge-XKAdIxxptpPPSBX0HfqcIdg.js?scope=footer&delta=0&language=en&theme=cosmos&include=eJx1kmuOpDAMhC8UiDRa7WpPYxlwhzRJjGzDdN9-zPRjXpo_wfU5FYVyUEbLI4wsFPGj7is2TDTBKReCbS2MkzfqWsgIaKdmh_RdU7jb1HhcwKuFJH4WAVXJILczjcYSz9q7Bf68_Pv7H3RmMTCSCtRmbCPV42w-gc0EMwnDjpLRWVbdCLhB5TCQuQfosrLebulSI27GoNtQs_22JVEjwRIGZlMTXGFAkcwxFR6wdGrXklsKI_OSaRWOz8qZVtb4tD7AD-s7bbt2uXqKXcJSSK6PhhbP5SH2PBF3a8FrV7JamNDQhWc40Ix7ZtFAF_ODlzjJtmLp7zIk5uTTMUwx-fJd93jGy1dYQxuhYEubXwuUym0iTzLy1kyuz05Q8lHNgGuGI9vHC4i_8PD-N0B18MQXLLYJxvv3RsMrQaWEPuUtnlhq_0rdAbqDdCfhZtSmN6ZXBd0&0=tdwrnx urlProvider:network]]]

Optimize LCP by making the LCP image discoverable from the HTML immediately, and avoiding lazy-loading

Why this matters

Performance issues directly impact user engagement and conversion rates.

lhId: page-0-IMG
nodeLabel: Mother and son cuddling on a couch in front of a window
path: 1,HTML,1,BODY,2,DIV,1,DIV,1,DIV,1,DIV,0,DIV,0,DIV,0,DIV,0,DIV,0,DIV,0,DIV,0,DIV,0,DIV,0,PICTURE,3,IMG
selector: div.carousel_img_video_image > div.field > picture > img
snippet: <img loading="lazy" width="945" height="993" src="/sites/novartiscom/files/styles/banner_gradient_half_image_1920/public/202…" alt="Mother and son cuddling on a couch in front of a window" typeof="foaf:Image">

Avoid chaining critical requests by reducing the length of chains, reducing the download size of resources, or deferring the download of unnecessary resources to improve page load.

Why this matters

Performance issues directly impact user engagement and conversion rates.

description: [preconnect](https://developer.chrome.com/docs/lighthouse/performance/uses-rel-preconnect/) hints help the browser establish a connection earlier in the page load, saving time when the first request for that origin is made. The following are the origins that the page preconnected to.
title: Preconnected origins
description: Add [preconnect](https://developer.chrome.com/docs/lighthouse/performance/uses-rel-preconnect/) hints to your most important origins, but try to use no more than 4.
title: Preconnect candidates

Requests are blocking the page's initial render, which may delay LCP. Deferring or inlining can move these network requests out of the critical path.

Why this matters

Performance issues directly impact user engagement and conversion rates.

URLTransfer SizeDuration
/sites/novartiscom/files/js/js_XxhNeXYR2zsyBLpDKl7qUQpBCS...367 B
www.novartis.com/modules/contrib/google_tag/js/gtag.js?tdwrnx700 B
/sites/novartiscom/files/css/css_QXAvsP_9ka40oU06UbzMmrv3...288.3 KiB1.5 s
/sites/novartiscom/files/css/css_0qKuUROEK8rPMa256eIE9Vs-...48.3 KiB303 ms
www.novartis.com/modules/contrib/cookiepro/js/cookiepro.js?tdwrnx563 B
www.novartis.com/modules/contrib/google_tag/js/gtm.js?tdwrnx649 B
/sites/novartiscom/files/css/css_E7Hkz5J8CDjgNTBsaJsUhIJ7...324 B
/sites/novartiscom/files/css/css_20ha_3JzD0Ma-dHS2pBOHFmq...4.6 KiB

Reducing the download time of images can improve the perceived load time of the page and LCP. Learn more about optimizing image size

Why this matters

Performance issues directly impact user engagement and conversion rates.

URLResource SizeEst Savings
Portrait of Michael Williams playing electric guitar div.carousel_img_video_image > div.field > picture > img
/sites/novartiscom/files/styles/cosmos_banner_half_image_...191.8 KiB167.5 KiB
Mother and son cuddling on a couch in front of a window div.carousel_img_video_image > div.field > picture > img
/sites/novartiscom/files/styles/banner_gradient_half_imag...155.0 KiB125.9 KiB
Business people walking on the Novartis Basel campus div.row > div.col-lg-6 > div.image-inner > img.img
/sites/novartiscom/files/styles/cta_image/public/2026-01/...95.2 KiB79.3 KiB
HCP wearing a medical coat pulling a cart bicycle in rural african village a.internal-link > div.card-body > div.gif-url-wrapper > img.img
/sites/novartiscom/files/styles/vertical_card/public/2026...96.1 KiB64.2 KiB
Child having medical examination div.row > div.col-lg-6 > div.image-inner > img.img
/sites/novartiscom/files/styles/cta_image/public/2025-09/...35.9 KiB20.1 KiB
Two business people smiling in a modern and bright room a.internal-link > div.card-body > div.gif-url-wrapper > img.img
/sites/novartiscom/files/styles/vertical_card/public/2026...48.1 KiB16.2 KiB
Happy father with daughter on his shoulders under a clear blue sky a.internal-link > div.card-body > div.gif-url-wrapper > img.img
/sites/novartiscom/files/styles/vertical_card/public/2026...47.4 KiB15.5 KiB
Close up on the hands of a laboratory technician wearing blue gloves preparing … a.internal-link > div.card-body > div.gif-url-wrapper > img.img
/sites/novartiscom/files/styles/vertical_card/public/2026...39.5 KiB10.9 KiB
Scientist in protective gear working in a laboratory div.row > div.col-lg-6 > div.image-inner > img.img
/sites/novartiscom/files/styles/cta_image/public/2025-09/...19.5 KiB10.8 KiB

These insights are also available in the Chrome DevTools Performance Panel - record a trace to view more detailed information.

Redirects introduce additional delays before the page can be loaded. Learn how to avoid page redirects.

Why this matters

Performance issues directly impact user engagement and conversion rates.

Estimated savings: 759 ms
URLTime Spent
novartis.com/759 ms
www.novartis.com/0.0 ms

Time to Interactive is the amount of time it takes for the page to become fully interactive. Learn more about the Time to Interactive metric.

Why this matters

Performance issues directly impact user engagement and conversion rates.

TTI

The maximum potential First Input Delay that your users could experience is the duration of the longest task. Learn more about the Maximum Potential First Input Delay metric.

Why this matters

Performance issues directly impact user engagement and conversion rates.

Diagnostics

Reduce unused rules from stylesheets and defer CSS not used for above-the-fold content to decrease bytes consumed by network activity. Learn how to reduce unused CSS.

Why this matters

Performance issues directly impact user engagement and conversion rates.

Estimated savings: 1.6 s 342.6 KiB
URLTransfer SizeEst Savings
/sites/novartiscom/files/css/css_QXAvsP_9ka40oU06UbzMmrv3...288.2 KiB275.7 KiB
/sites/novartiscom/files/css/css_0qKuUROEK8rPMa256eIE9Vs-...48.2 KiB46.3 KiB
23.4 KiB20.6 KiB

Reduce unused JavaScript and defer loading scripts until they are required to decrease bytes consumed by network activity. Learn how to reduce unused JavaScript.

Why this matters

Performance issues directly impact user engagement and conversion rates.

Estimated savings: 1.2 s 275.5 KiB
URLTransfer SizeEst Savings
/sites/novartiscom/files/js/js_RBDtWSKtcMyC24sM1Ge-XKAdIx...183.7 KiB122.7 KiB
cdn.cookielaw.org/scripttemplates/202604.1.0/otBannerSdk.js130.8 KiB69.1 KiB
www.googletagmanager.com/gtm.js?id=GTM-57RJQ5182.3 KiB56.4 KiB
/pages/versioned/common-scripts/4ce8c7df8d425cc5046457682...55.1 KiB27.3 KiB

Consider reducing the time spent parsing, compiling, and executing JS. You may find delivering smaller JS payloads helps with this. Learn how to reduce Javascript execution time.

Why this matters

Performance issues directly impact user engagement and conversion rates.

URLTotal CPU TimeScript EvaluationScript Parse
/sites/novartiscom/files/js/js_RBDtWSKtcMyC24sM1Ge-XKAdIx...1.0 s521 ms99 ms
www.googletagmanager.com/gtm.js?id=GTM-57RJQ5658 ms527 ms80 ms
Unattributable626 ms140 ms0.0 ms
cdn.cookielaw.org/scripttemplates/202604.1.0/otBannerSdk.js416 ms293 ms65 ms
/pages/versioned/common-scripts/4ce8c7df8d425cc5046457682...380 ms325 ms23 ms
www.novartis.com/355 ms8.3 ms2.1 ms
/sites/novartiscom/files/css/css_QXAvsP_9ka40oU06UbzMmrv3...110 ms0.0 ms0.0 ms
/pages/versioned/tracking-scripts/158692313dc4b9f2e28d9e9...75 ms65 ms8.8 ms
static.ads-twitter.com/uwt.js64 ms57 ms5.6 ms
/beacon.min.js/v8c78df7c7c0f484497ecbca7046644da177152312...52 ms30 ms4.9 ms

Consider reducing the time spent parsing, compiling and executing JS. You may find delivering smaller JS payloads helps with this. Learn how to minimize main-thread work

Why this matters

Performance issues directly impact user engagement and conversion rates.

CategoryTime Spent
Script Evaluation2.0 s
Other882 ms
Style & Layout454 ms
Script Parsing & Compilation308 ms
Parse HTML & CSS201 ms
Rendering32 ms
Garbage Collection24 ms

Set an explicit width and height on image elements to reduce layout shifts and improve CLS. Learn how to set image dimensions

Why this matters

Performance issues directly impact user engagement and conversion rates.

URL
Scientist in protective gear working in a laboratory div.row > div.col-lg-6 > div.image-inner > img.img
/sites/novartiscom/files/styles/cta_image/public/2025-09/...
Child having medical examination div.row > div.col-lg-6 > div.image-inner > img.img
/sites/novartiscom/files/styles/cta_image/public/2025-09/...
Business people walking on the Novartis Basel campus div.row > div.col-lg-6 > div.image-inner > img.img
/sites/novartiscom/files/styles/cta_image/public/2026-01/...
Novartis nav#navbar-main > a.navbar-brand > picture.d-inline-block > img.img-fluid
www.novartis.com/themes/custom/cosmos/mobile_logo.svg

More information about the performance of your application. These numbers don't directly affect the Performance score.

●Layout shift culprits
●Optimize DOM size
●Font display
●LCP breakdown
●Modern HTTP
●Optimize viewport for mobile
●Minify CSS
●Minify JavaScript
●Avoids enormous network payloads Total size was 2,320 KiB
●Avoid long main-thread tasks 16 long tasks found
●Avoid non-composited animations 5 animated elements found
●Page didn't prevent back/forward cache restoration
●Network Requests
●Network Round Trip Times 50 ms
●Server Backend Latencies 150 ms
●Tasks
●Diagnostics
●Metrics
●Screenshot Thumbnails
●Final Screenshot
●Script Treemap Data
●Resources Summary
●Initial server response time was short Root document took 40 ms
●Avoid large layout shifts 1 layout shift found
○INP breakdown
○User Timing marks and measures
97

Accessibility

These checks highlight opportunities to improve the accessibility of your web app. Automatic detection can only detect a subset of issues and does not guarantee the accessibility of your web app, so manual testing is also encouraged.

Best practices

Touch targets with sufficient size and spacing help users who may have difficulty targeting small controls to activate the targets. Learn more about touch targets.

Why this matters

Performance issues directly impact user engagement and conversion rates.

Failing Elements
Terms of use div.bottom-organsim > ul.clearfix > li.nav-item > a.nav-link
Privacy div.bottom-organsim > ul.clearfix > li.nav-item > a.nav-link
Cookie Settings div.bottom-organsim > ul.clearfix > li.nav-item > a.ot-sdk-show-settings
Contacts div.bottom-organsim > ul.clearfix > li.nav-item > a.nav-link
Locations div.bottom-organsim > ul.clearfix > li.nav-item > a.nav-link
Site map div.bottom-organsim > ul.clearfix > li.nav-item > a.nav-link
Open source div.bottom-organsim > ul.clearfix > li.nav-item > a.nav-link
Web accessibility div.bottom-organsim > ul.clearfix > li.nav-item > a.nav-link

These items highlight common accessibility best practices.

○Interactive controls are keyboard focusable
○Interactive elements indicate their purpose and state
○The page has a logical tab order
○Visual order on the page follows DOM order
○User focus is not accidentally trapped in a region
○The user's focus is directed to new content added to the page
○HTML5 landmark elements are used to improve navigation
○Offscreen content is hidden from assistive technology
○Custom controls have associated labels
○Custom controls have ARIA roles
●`[aria-*]` attributes match their roles
●`[aria-hidden="true"]` is not present on the document `<body>`
●`[role]`s have all required `[aria-*]` attributes
●`[role]` values are valid
●`[aria-*]` attributes have valid values
●`[aria-*]` attributes are valid and not misspelled
●Buttons have an accessible name
●Image elements have `[alt]` attributes
●Input buttons have discernible text.
●Form elements have associated labels
●`[user-scalable="no"]` is not used in the `<meta name="viewport">` element and the `[maximum-scale]` attribute is not less than 5.
●ARIA attributes are used as specified for the element's role
●Elements with `role="dialog"` or `role="alertdialog"` have accessible names.
●`[aria-hidden="true"]` elements do not contain focusable descendents
●Elements use only permitted ARIA attributes
●Background and foreground colors have a sufficient contrast ratio
●Document has a `<title>` element
●`<html>` element has a `[lang]` attribute
●`<html>` element has a valid value for its `[lang]` attribute
●Links have a discernible name
●Lists contain only `<li>` elements and script supporting elements (`<script>` and `<template>`).
●List items (`<li>`) are contained within `<ul>`, `<ol>` or `<menu>` parent elements
●No element has a `[tabindex]` value greater than 0
●Heading elements appear in a sequentially-descending order
●Document has a main landmark.
●Deprecated ARIA roles were not used
●Identical links have the same purpose.
●Elements with visible text labels have matching accessible names.
○`[accesskey]` values are unique
○`button`, `link`, and `menuitem` elements have accessible names
○ARIA input fields have accessible names
○ARIA `meter` elements have accessible names
○ARIA `progressbar` elements have accessible names
○Elements with an ARIA `[role]` that require children to contain a specific `[role]` have all required children.
○`[role]`s are contained by their required parent element
○Elements with the `role=text` attribute do not have focusable descendents.
○ARIA toggle fields have accessible names
○ARIA `tooltip` elements have accessible names
○ARIA `treeitem` elements have accessible names
○The page contains a heading, skip link, or landmark region
○`<dl>`'s contain only properly-ordered `<dt>` and `<dd>` groups, `<script>`, `<template>` or `<div>` elements.
○Definition list items are wrapped in `<dl>` elements
○ARIA IDs are unique
○No form fields have multiple labels
○`<frame>` or `<iframe>` elements have a title
○`<html>` element has an `[xml:lang]` attribute with the same base language as the `[lang]` attribute.
○`<input type="image">` elements have `[alt]` text
○Links are distinguishable without relying on color.
○The document does not use `<meta http-equiv="refresh">`
○`<object>` elements have alternate text
○Select elements have associated label elements.
○Skip links are focusable.
○Cells in a `<table>` element that use the `[headers]` attribute refer to table cells within the same table.
○`<th>` elements and elements with `[role="columnheader"/"rowheader"]` have data cells they describe.
○`[lang]` attributes have a valid value
○`<video>` elements contain a `<track>` element with `[kind="captions"]`
○Tables have different content in the summary attribute and `<caption>`.
○All heading elements contain content.
○Uses ARIA roles only on compatible elements
○Image elements do not have `[alt]` attributes that are redundant text.
○Tables use `<caption>` instead of cells with the `[colspan]` attribute to indicate a caption.
○`<td>` elements in a large `<table>` have one or more table headers.
100

Best Practices

General

Source maps translate minified code to the original source code. This helps developers debug in production. In addition, Lighthouse is able to provide further insights. Consider deploying source maps to take advantage of these benefits. Learn more about source maps.

Why this matters

Performance issues directly impact user engagement and conversion rates.

URL
/sites/novartiscom/files/js/js_RBDtWSKtcMyC24sM1Ge-XKAdIx...
●Uses HTTPS
●Avoids deprecated APIs
●Avoids third-party cookies
●Allows users to paste into input fields
●Avoids requesting the geolocation permission on page load
●Avoids requesting the notification permission on page load
●Displays images with correct aspect ratio
●Serves images with appropriate resolution
●Page has the HTML doctype
●Properly defines charset
●No browser errors logged to the console
●No issues in the `Issues` panel in Chrome Devtools
●Ensure CSP is effective against XSS attacks
●Use a strong HSTS policy
●Ensure proper origin isolation with COOP
●Mitigate DOM-based XSS with Trusted Types
●Detected JavaScript libraries
○Redirects HTTP traffic to HTTPS
○Mitigate clickjacking with XFO or CSP
92

SEO

These checks ensure that your page is following basic search engine optimization advice. There are many additional factors Lighthouse does not score here that may affect your search ranking, including performance on Core Web Vitals. Learn more about Google Search Essentials.

Content Best Practices

Descriptive link text helps search engines understand your content. Learn how to make links more accessible.

Why this matters

Performance issues directly impact user engagement and conversion rates.

Link destinationLink Text
www.novartis.com/us-en/about/investing-americas-healthLearn more
www.novartis.com/investors/reporting-and-transparency-hub#annual-report-form-20fLearn more

Format your HTML in a way that enables crawlers to better understand your app’s content.

○Structured data is valid
●Page isn’t blocked from indexing
●Document has a `<title>` element
●Document has a meta description
●Page has successful HTTP status code
●Links are crawlable
●robots.txt is valid
●Image elements have `[alt]` attributes
●Document has a valid `hreflang`
●Document has a valid `rel=canonical`

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