Webperf result support.optimizely.com/hc/en-us

Standards section:
- Page not found, no valid 404 response status code usederror
Tested:
- https://support.optimizely.com/hc/en-us/700a7/finns-det-en-sida/pa-den-har-adressen/testanrop/

- Page not found, no valid h1 header foundwarning
Tested:
- https://support.optimizely.com/hc/en-us/700a7/finns-det-en-sida/pa-den-har-adressen/testanrop/

- Page not found, invalid text foundwarning
Tested:
- https://support.optimizely.com/hc/en-us/700a7/finns-det-en-sida/pa-den-har-adressen/testanrop/

- Page not found, no valid body text found, may because it is too shortwarning
Tested:
- https://support.optimizely.com/hc/en-us/700a7/finns-det-en-sida/pa-den-har-adressen/testanrop/

- Page not found, has expected 404 responseok
- Page not found, valid title foundok
- Page not found, valid text foundok
- Page not found, used supported localeok
- Page not found, network is usableok

Security section:
- security.txt has incorrect contenterror
Tested:
- https://support.optimizely.com/.well-known/security.txt
- https://support.optimizely.com/security.txt

- security.txt is missing the required contact infowarning
Tested:
- https://support.optimizely.com/.well-known/security.txt
- https://support.optimizely.com/security.txt

- security.txt requires expiration information (added in draft v10) is missingwarning
Tested:
- https://support.optimizely.com/.well-known/security.txt
- https://support.optimizely.com/security.txt

- Sitemap, Url in <loc> has to start with https://ok
- security.txt is missingok

Standards section:
- Feed is missing in the HTML's metadatawarning
Tested:
- https://support.optimizely.com/hc/en-us

- robots.txt is missing, not allowed to download or has not the expected contentok
- Sitemap is not specified in robots.txtok
- Sitemap, no valid sitemap foundok
- Sitemap, Url in <loc> must use same domain as robots.txtok
- Sitemap, No duplicate Urls in <loc> allowedok
- Sitemap, lists other stuff then webpagesok
- Sitemap, is exceeding 50 000 itemsok
- Sitemap, has no itemsok

Performance section:
- [desktop] TTFB (Time to First Byte): 293.00ms, ±164.00ms 3.00
- [desktop] DOMContentLoaded: 1780.00ms, ±310.00ms 2.44
- [desktop] LCP (Largest Contentful Paint): 1666.67ms, ±173.33ms 1.00
- [desktop] Load: 2910.00ms, ±210.00ms 0.18
- [desktop] TBT (Total Blocking Time): 299.00ms, ±44.00ms 3.00
- [desktop] CLS (Cumulative Layout Shift): 0.00ms, ±0.00ms 5.00
- [desktop] FirstVisualChange: 1605.00ms, ±65.00ms 2.79
- [desktop] SpeedIndex: 1675.00ms, ±125.00ms 2.65
- [desktop] VisualComplete85: 1725.00ms, ±185.00ms 2.55
- [desktop] FCP (First Contentful Paint): 1550.00ms, ±0.00ms 5.00
- [desktop] firstPaint: 962.00ms, ±158.00ms
- [desktop] LastVisualChange: 2895.00ms, ±185.00ms
- [mobile] TTFB (Time to First Byte): 163.67ms, ±38.33ms 5.00
- [mobile] DOMContentLoaded: 1670.00ms, ±370.00ms 4.66
- [mobile] LCP (Largest Contentful Paint): 1310.00ms, ±10.00ms 5.00
- [mobile] Load: 2516.67ms, ±43.33ms 2.97
- [mobile] TBT (Total Blocking Time): 269.67ms, ±28.33ms 3.00
- [mobile] CLS (Cumulative Layout Shift): 0.00ms, ±0.00ms 5.00
- [mobile] FirstVisualChange: 1290.00ms, ±20.00ms 5.00
- [mobile] SpeedIndex: 1310.00ms, ±20.00ms 5.00
- [mobile] VisualComplete85: 1305.00ms, ±5.00ms 5.00
- [mobile] FCP (First Contentful Paint): 1260.00ms, ±0.00ms 5.00
- [mobile] firstPaint: 806.00ms, ±30.00ms
- [mobile] LastVisualChange: 1960.00ms, ±490.00ms

Accessibility section:
- This form field should be labelled in some way. Use the label element (either with a "for" attribute or wrapped around the form field), or "title", "aria-label" or "aria-labelledby" attributes as appropriate.error
Tested:
- https://support.optimizely.com/hc/en-us

- Iframe element requires a non-empty title attribute that identifies the frame.error
Tested:
- https://support.optimizely.com/hc/en-us

- This form does not contain a submit button, which creates issues for those who cannot submit the form using the keyboard. Submit buttons are INPUT elements with type attribute "submit" or "image", or BUTTON elements with type "submit" or omitted/invalid.error
Tested:
- https://support.optimizely.com/hc/en-us

- This textinput element does not have a name available to an accessibility API. Valid names are: label element, title undefined, aria-label undefined, aria-labelledby undefined.error
Tested:
- https://support.optimizely.com/hc/en-us

- Duplicate id attribute value "query" found on the web page.error
Tested:
- https://support.optimizely.com/hc/en-us

- Duplicate id attribute value "searchWidgetTrigger" found on the web page.error
Tested:
- https://support.optimizely.com/hc/en-us

- This textarea element does not have a name available to an accessibility API. Valid names are: label element, title undefined, aria-label undefined, aria-labelledby undefined.error
Tested:
- https://support.optimizely.com/hc/en-us

- Rather poor on user privacy.

Security section:
- HTTPS by default is good! 5.00
- HTTP Strict Transport Security HSTS is good, but with 1 warning(s). 4.75
- Content Security Policy is pretty bad. 1.00
- Reporting CSP Certificate Transparency Network Error Logging is not that good. 2.50
- Referrer Policy is not that good. 2.50
- Subresource Integrity SRI is pretty bad. 1.00
- HTTP headers is ok, with 1 error(s) and 0 warning(s). 4.50
- Cookies is ok, with 9 error(s) and 0 warning(s). 1.00

- Webpage generates very little carbon dioxide!
- Carbon dioxide per pageview: 0.43 gram(s)
- More green than 99 % of the websites tested by webperf.se (Reference updated: 2025-01-09).
- Network transfer size: 691.02 KB 5.00

- Metadata used: preload, viewport
- Languages found: en-us
- Image formats used: ico, png

Accessibility section:
##### You don't seem to be using accessibility overlay software 5.00

Security section:
##### NO Common Vulnerabilities and Exposures found 5.00
##### You seem to be up to date for all software we can identify 5.00
##### Opensource software used seem to be maintained 5.00
##### You don't seem to be using 'END OF LIFE' software 5.00

Standards section:
- CSS, Disallow unknown annotationsok
More info:
- https://stylelint.io/user-guide/rules/annotation-no-unknown

- CSS, Disallow unknown descriptors for at-rulesok
More info:
- https://stylelint.io/user-guide/rules/at-rule-descriptor-no-unknown

- CSS, Disallow unknown values for descriptors within at-rulesok
More info:
- https://stylelint.io/user-guide/rules/at-rule-descriptor-value-no-unknown

- CSS, Disallow deprecated at-rulesok
More info:
- https://stylelint.io/user-guide/rules/at-rule-no-deprecated

- CSS, Disallow unknown at-rulesok
More info:
- https://stylelint.io/user-guide/rules/at-rule-no-unknown

- CSS, Disallow invalid preludes for at-rulesok
More info:
- https://stylelint.io/user-guide/rules/at-rule-prelude-no-invalid

- CSS, Disallow empty blocksok
More info:
- https://stylelint.io/user-guide/rules/block-no-empty

- CSS, Disallow invalid hex colorsok
More info:
- https://stylelint.io/user-guide/rules/color-no-invalid-hex

- CSS, Disallow empty commentsok
More info:
- https://stylelint.io/user-guide/rules/comment-no-empty

- CSS, Disallow deprecated keywords for properties within declarationsok
More info:
- https://stylelint.io/user-guide/rules/declaration-property-value-keyword-no-deprecated

- CSS, Disallow unknown values for properties within declarationsok
More info:
- https://stylelint.io/user-guide/rules/declaration-property-value-no-unknown

- CSS, Disallow non-standard direction values for linear gradient functionsok
More info:
- https://stylelint.io/user-guide/rules/function-linear-gradient-no-nonstandard-direction

- CSS, Disallow unknown functionsok
More info:
- https://stylelint.io/user-guide/rules/function-no-unknown

- CSS, Disallow unknown media feature namesok
More info:
- https://stylelint.io/user-guide/rules/media-feature-name-no-unknown

- CSS, Disallow unknown values for media featuresok
More info:
- https://stylelint.io/user-guide/rules/media-feature-name-value-no-unknown

- CSS, Disallow invalid media queriesok
More info:
- https://stylelint.io/user-guide/rules/media-query-no-invalid

- CSS, Disallow invalid named grid areasok
More info:
- https://stylelint.io/user-guide/rules/named-grid-areas-no-invalid

- CSS, Disallow empty sourcesok
More info:
- https://stylelint.io/user-guide/rules/no-empty-source

- CSS, Disallow invalid double-slash commentsok
More info:
- https://stylelint.io/user-guide/rules/no-invalid-double-slash-comments

- CSS, Disallow invalid position `@import` rulesok
More info:
- https://stylelint.io/user-guide/rules/no-invalid-position-at-import-rule

- CSS, Disallow unknown animationsok
More info:
- https://stylelint.io/user-guide/rules/no-unknown-animations

- CSS, Disallow unknown custom media queriesok
More info:
- https://stylelint.io/user-guide/rules/no-unknown-custom-media

- CSS, Disallow unknown custom propertiesok
More info:
- https://stylelint.io/user-guide/rules/no-unknown-custom-properties

- CSS, Disallow unknown propertiesok
More info:
- https://stylelint.io/user-guide/rules/property-no-unknown

- CSS, Disallow unknown pseudo-class selectorsok
More info:
- https://stylelint.io/user-guide/rules/selector-pseudo-class-no-unknown

- CSS, Disallow unknown pseudo-element selectorsok
More info:
- https://stylelint.io/user-guide/rules/selector-pseudo-element-no-unknown

- CSS, Disallow unknown type selectorsok
More info:
- https://stylelint.io/user-guide/rules/selector-type-no-unknown

- CSS, Disallow invalid syntax stringsok
More info:
- https://stylelint.io/user-guide/rules/syntax-string-no-invalid

- CSS, Disallow unknown unitsok
More info:
- https://stylelint.io/user-guide/rules/unit-no-unknown

Standards section:
- Require attributes to be separated by whitespaceok
More info:
- https://html-validate.org/rules/attr-spacing.html

- Validate permitted attribute valuesok
More info:
- https://html-validate.org/rules/attribute-allowed-values.html

- Require attribute to be used in correct contextok
More info:
- https://html-validate.org/rules/attribute-misuse.html

- Disallow end tags from having attributesok
More info:
- https://html-validate.org/rules/close-attr.html

- Require elements to be closed in correct orderok
More info:
- https://html-validate.org/rules/close-order.html

- Disallow usage of deprecated elementsok
More info:
- https://html-validate.org/rules/deprecated.html

- Disallow usage of deprecated rulesok
More info:
- https://html-validate.org/rules/deprecated-rule.html

- Require usage of `html` doctypeok
More info:
- https://html-validate.org/rules/doctype-html.html

- Disallow invalid element namesok
More info:
- https://html-validate.org/rules/element-name.html

- Validate permitted contentok
More info:
- https://html-validate.org/rules/element-permitted-content.html

- Validate permitted number of element occurrencesok
More info:
- https://html-validate.org/rules/element-permitted-occurrences.html

- Validate required element orderok
More info:
- https://html-validate.org/rules/element-permitted-order.html

- Validate permitted element parentok
More info:
- https://html-validate.org/rules/element-permitted-parent.html

- Ensure required attributes are setok
More info:
- https://html-validate.org/rules/element-required-attributes.html

- Ensure required elements are presentok
More info:
- https://html-validate.org/rules/element-required-content.html

- Require `<map name>` to be uniqueok
More info:
- https://html-validate.org/rules/map-dup-name.html

- Require name and id to match on `<map>` elementsok
More info:
- https://html-validate.org/rules/map-id-name.html

- Disallow usage of deprecated attributesok
More info:
- https://html-validate.org/rules/no-deprecated-attr.html

- Disallow duplicated attributesok
More info:
- https://html-validate.org/rules/no-dup-attr.html

- Disallow duplicated IDsok
More info:
- https://html-validate.org/rules/no-dup-id.html

- Disallow multiple `<main>`ok
More info:
- https://html-validate.org/rules/no-multiple-main.html

- Disallow the use of unescaped special charactersok
More info:
- https://html-validate.org/rules/no-raw-characters.html

- Disallow unused disable directivesok
More info:
- https://html-validate.org/rules/no-unused-disable.html

- Require end tag for `<script>`ok
More info:
- https://html-validate.org/rules/script-element.html

- Disallow unrecognized character referencesok
More info:
- https://html-validate.org/rules/unrecognized-char-ref.html

- Require autocomplete attribute to be validok
More info:
- https://html-validate.org/rules/valid-autocomplete.html

- Require `id` to be a valid identifierok
More info:
- https://html-validate.org/rules/valid-id.html

- Disallow void element with contentok
More info:
- https://html-validate.org/rules/void-content.html

Security section:
- Javascript, require the use of === and !==error
More info:
- https://eslint.org/docs/latest/rules/eqeqeq

Tested:
- https://challenges.cloudflare.com/cdn-cgi/challenge-platform/h/g/orchestrate/chl_api/v1?ray=958f38444a014434&lang=auto
- https://support.optimizely.com/cdn-cgi/challenge-platform/h/g/orchestrate/chl_page/v1?ray=958f38416ad73ea1
- https://challenges.cloudflare.com/turnstile/v0/g/5f8a20c0c87c/api.js?onload=FEVu7&render=explicit

- Javascript, disallow control flow statements in finally blockserror
More info:
- https://eslint.org/docs/latest/rules/no-unsafe-finally

Tested:
- https://challenges.cloudflare.com/turnstile/v0/g/5f8a20c0c87c/api.js?onload=FEVu7&render=explicit

- Javascript, disallow the use of eval()error
More info:
- https://eslint.org/docs/latest/rules/no-eval

Tested:
- https://challenges.cloudflare.com/cdn-cgi/challenge-platform/h/g/orchestrate/chl_api/v1?ray=958f38444a014434&lang=auto
- https://support.optimizely.com/cdn-cgi/challenge-platform/h/g/orchestrate/chl_page/v1?ray=958f38416ad73ea1

- Javascript, disallow the use of eval()-like methodsok
More info:
- https://eslint.org/docs/latest/rules/no-implied-eval

- Javascript, disallow new operators with the Function objectok
More info:
- https://eslint.org/docs/latest/rules/no-new-func

- Javascript, disallow javascript: URLsok
More info:
- https://eslint.org/docs/latest/rules/no-script-url

- Javascript, disallow negating the left operand of relational operatorsok
More info:
- https://eslint.org/docs/latest/rules/no-unsafe-negation

- Javascript, disallow calling some Object.prototype methods directly on objectsok
More info:
- https://eslint.org/docs/latest/rules/no-prototype-builtins

- Javascript, disallow with statementsok
More info:
- https://eslint.org/docs/latest/rules/no-with

- Javascript, disallow async functions which have no await expressionok
More info:
- https://eslint.org/docs/latest/rules/require-await

Standards section:
- Javascript, disallow the use of undeclared variables unless mentioned in /*global */ commentswarning
More info:
- https://eslint.org/docs/latest/rules/no-undef

Tested:
- https://challenges.cloudflare.com/cdn-cgi/challenge-platform/h/g/orchestrate/chl_api/v1?ray=958f38444a014434&lang=auto
- https://support.optimizely.com/cdn-cgi/challenge-platform/h/g/orchestrate/chl_page/v1?ray=958f38416ad73ea1

- Javascript, disallow unused variableswarning
More info:
- https://eslint.org/docs/latest/rules/no-unused-vars

Tested:
- https://challenges.cloudflare.com/cdn-cgi/challenge-platform/h/g/orchestrate/chl_api/v1?ray=958f38444a014434&lang=auto
- https://support.optimizely.com/cdn-cgi/challenge-platform/h/g/orchestrate/chl_page/v1?ray=958f38416ad73ea1
- https://challenges.cloudflare.com/turnstile/v0/g/5f8a20c0c87c/api.js?onload=FEVu7&render=explicit

- Javascript, disallow unnecessary escape characterswarning
More info:
- https://eslint.org/docs/latest/rules/no-useless-escape

Tested:
- https://support.optimizely.com/hc/favicon.ico
- https://support.optimizely.com/hc/en-us

- Javascript, disallow the use of consolewarning
More info:
- https://eslint.org/docs/latest/rules/no-console

Tested:
- https://challenges.cloudflare.com/cdn-cgi/challenge-platform/h/g/orchestrate/chl_api/v1?ray=958f38444a014434&lang=auto
- https://challenges.cloudflare.com/turnstile/v0/g/5f8a20c0c87c/api.js?onload=FEVu7&render=explicit

- Javascript, disallow unmodified loop conditionswarning
More info:
- https://eslint.org/docs/latest/rules/no-unmodified-loop-condition

Tested:
- https://challenges.cloudflare.com/turnstile/v0/g/5f8a20c0c87c/api.js?onload=FEVu7&render=explicit

- Javascript, disallow unnecessary concatenation of literals or template literalsok
More info:
- https://eslint.org/docs/latest/rules/no-useless-concat

- Performance only 5.00
- Accessibility only 4.00

- third-party-cookieserror
Tested:
- https://support.optimizely.com/hc/en-us

- errors-in-consoleerror
Tested:
- https://support.optimizely.com/hc/en-us

- Issues in the `Issues` panel in Chrome Devtoolserror
Tested:
- https://support.optimizely.com/hc/en-us

- meta-descriptionerror
Tested:
- https://support.optimizely.com/hc/en-us

- Uses HTTPSok
Tested:
- https://support.optimizely.com/hc/en-us

- geolocation-on-startok
Tested:
- https://support.optimizely.com/hc/en-us

- notification-on-startok
Tested:
- https://support.optimizely.com/hc/en-us

- csp-xssok
Tested:
- https://support.optimizely.com/hc/en-us

- has-hstsok
Tested:
- https://support.optimizely.com/hc/en-us

- origin-isolationok
Tested:
- https://support.optimizely.com/hc/en-us

- paste-preventing-inputsok
Tested:
- https://support.optimizely.com/hc/en-us

- image-aspect-ratiook
Tested:
- https://support.optimizely.com/hc/en-us

- Serves images with low resolutionok
Tested:
- https://support.optimizely.com/hc/en-us

- Has a <meta name="viewport"> tag with width or initial-scaleok
Tested:
- https://support.optimizely.com/hc/en-us

- font-sizeok
Tested:
- https://support.optimizely.com/hc/en-us

- doctypeok
Tested:
- https://support.optimizely.com/hc/en-us

- charsetok
Tested:
- https://support.optimizely.com/hc/en-us

- js-librariesok
Tested:
- https://support.optimizely.com/hc/en-us

- deprecationsok
Tested:
- https://support.optimizely.com/hc/en-us

- valid-source-mapsok
Tested:
- https://support.optimizely.com/hc/en-us

- is-crawlableok
Tested:
- https://support.optimizely.com/hc/en-us

- Document has a `<title>` elementok
Tested:
- https://support.optimizely.com/hc/en-us

- http-status-codeok
Tested:
- https://support.optimizely.com/hc/en-us

- link-textok
Tested:
- https://support.optimizely.com/hc/en-us

- crawlable-anchorsok
Tested:
- https://support.optimizely.com/hc/en-us

- robots-txtok
Tested:
- https://support.optimizely.com/hc/en-us

- Image elements have `[alt]` attributesok
Tested:
- https://support.optimizely.com/hc/en-us

- hreflangok
Tested:
- https://support.optimizely.com/hc/en-us

- canonicalok
Tested:
- https://support.optimizely.com/hc/en-us

- Redirects HTTP traffic to HTTPSok
- structured-dataok

Accessibility section:
- tabindexerror
Tested:
- https://support.optimizely.com/hc/en-us

- Touch targets should have sufficient size and spacingerror
Tested:
- https://support.optimizely.com/hc/en-us

- `[aria-*]` attributes match their rolesok
Tested:
- https://support.optimizely.com/hc/en-us

- Uses ARIA roles only on compatible elementsok
Tested:
- https://support.optimizely.com/hc/en-us

- ARIA attributes are used as specified for the element's roleok
Tested:
- https://support.optimizely.com/hc/en-us

- Deprecated ARIA roles were not usedok
Tested:
- https://support.optimizely.com/hc/en-us

- `[aria-hidden="true"]` is not present on the document `<body>`ok
Tested:
- https://support.optimizely.com/hc/en-us

- `[aria-hidden="true"]` elements do not contain focusable descendentsok
Tested:
- https://support.optimizely.com/hc/en-us

- Elements use only permitted ARIA attributesok
Tested:
- https://support.optimizely.com/hc/en-us

- `[role]`s have all required `[aria-*]` attributesok
Tested:
- https://support.optimizely.com/hc/en-us

- `[role]` values are validok
Tested:
- https://support.optimizely.com/hc/en-us

- `[aria-*]` attributes have valid valuesok
Tested:
- https://support.optimizely.com/hc/en-us

- `[aria-*]` attributes are valid and not misspelledok
Tested:
- https://support.optimizely.com/hc/en-us

- Buttons have an accessible nameok
Tested:
- https://support.optimizely.com/hc/en-us

- Background and foreground colors have a sufficient contrast ratiook
Tested:
- https://support.optimizely.com/hc/en-us

- Document has a `<title>` elementok
Tested:
- https://support.optimizely.com/hc/en-us

- frame-titleok
Tested:
- https://support.optimizely.com/hc/en-us

- Heading elements appear in a sequentially-descending orderok
Tested:
- https://support.optimizely.com/hc/en-us

- `<html>` element has a `[lang]` attributeok
Tested:
- https://support.optimizely.com/hc/en-us

- `<html>` element has a valid value for its `[lang]` attributeok
Tested:
- https://support.optimizely.com/hc/en-us

- Image elements have `[alt]` attributesok
Tested:
- https://support.optimizely.com/hc/en-us

- Image elements do not have `[alt]` attributes that are redundant textok
Tested:
- https://support.optimizely.com/hc/en-us

- labelok
Tested:
- https://support.optimizely.com/hc/en-us

- Links have a discernible nameok
Tested:
- https://support.optimizely.com/hc/en-us

- Lists contain only `<li>` elements and script supporting elements (`<script>` and `<template>`)ok
Tested:
- https://support.optimizely.com/hc/en-us

- List items (`<li>`) are contained within `<ul>`, `<ol>` or `<menu>` parent elementsok
Tested:
- https://support.optimizely.com/hc/en-us

- `[user-scalable="no"]` is not used in the `<meta name="viewport">` element and the `[maximum-scale]` attribute is not less than 5ok
Tested:
- https://support.optimizely.com/hc/en-us

- identical-links-same-purposeok
Tested:
- https://support.optimizely.com/hc/en-us

- accesskeysok
- aria-command-nameok
- aria-dialog-nameok
- aria-input-field-nameok
- aria-meter-nameok
- aria-progressbar-nameok
- Elements with an ARIA `[role]` that require children to contain a specific `[role]` have all required childrenok
- `[role]`s are contained by their required parent elementok
- aria-textok
- aria-toggle-field-nameok
- aria-tooltip-nameok
- aria-treeitem-nameok
- bypassok
- definition-listok
- dlitemok
- duplicate-id-ariaok
- form-field-multiple-labelsok
- html-xml-lang-mismatchok
- input-button-nameok
- input-image-altok
- Links are distinguishable without relying on colorok
- meta-refreshok
- object-altok
- select-nameok
- skip-linkok
- table-duplicate-nameok
- td-headers-attrok
- th-has-data-cellsok
- valid-langok
- video-captionok
- focusable-controlsok
- interactive-element-affordanceok
- logical-tab-orderok
- visual-order-follows-domok
- focus-trapsok
- managed-focusok
- use-landmarksok
- offscreen-content-hiddenok
- custom-controls-labelsok
- custom-controls-rolesok
- empty-headingok
- landmark-one-mainok
- label-content-name-mismatchok
- table-fake-captionok
- td-has-headerok

Performance section:
- Largest Contentful Painterror
Tested:
- https://support.optimizely.com/hc/en-us

- Time to Interactiveerror
Tested:
- https://support.optimizely.com/hc/en-us

- Properly size imageserror
Tested:
- https://support.optimizely.com/hc/en-us

- Minify CSSerror
Tested:
- https://support.optimizely.com/hc/en-us

- Reduce unused CSSerror
Tested:
- https://support.optimizely.com/hc/en-us

- Reduce unused JavaScripterror
Tested:
- https://support.optimizely.com/hc/en-us

- Efficiently encode imageserror
Tested:
- https://support.optimizely.com/hc/en-us

- Serve images in next-gen formatserror
Tested:
- https://support.optimizely.com/hc/en-us

- third-party-summaryerror
Tested:
- https://support.optimizely.com/hc/en-us

- First Contentful Paintwarning
Tested:
- https://support.optimizely.com/hc/en-us

- Total Blocking Timewarning
Tested:
- https://support.optimizely.com/hc/en-us

- Speed Indexwarning
Tested:
- https://support.optimizely.com/hc/en-us

- Max Potential First Input Delaywarning
Tested:
- https://support.optimizely.com/hc/en-us

- Preconnect to required originswarning
Tested:
- https://support.optimizely.com/hc/en-us

- Avoid serving legacy JavaScript to modern browserswarning
Tested:
- https://support.optimizely.com/hc/en-us

- Avoids enormous network payloadswarning
Tested:
- https://support.optimizely.com/hc/en-us

- Serve static assets with an efficient cache policywarning
Tested:
- https://support.optimizely.com/hc/en-us

- All text should remains visible during webfont loadswarning
Tested:
- https://support.optimizely.com/hc/en-us

- Image elements should have explicit `width` and `height`warning
Tested:
- https://support.optimizely.com/hc/en-us

- Cumulative Layout Shiftok
Tested:
- https://support.optimizely.com/hc/en-us

- Defer offscreen imagesok
Tested:
- https://support.optimizely.com/hc/en-us

- Minify JavaScriptok
Tested:
- https://support.optimizely.com/hc/en-us

- Enable text compressionok
Tested:
- https://support.optimizely.com/hc/en-us

- Initial server response time was shortok
Tested:
- https://support.optimizely.com/hc/en-us

- Avoid multiple page redirectsok
Tested:
- https://support.optimizely.com/hc/en-us

- Use video formats for animated contentok
Tested:
- https://support.optimizely.com/hc/en-us

- Remove duplicate modules in JavaScript bundlesok
Tested:
- https://support.optimizely.com/hc/en-us

- Avoid an excessive DOM sizeok
Tested:
- https://support.optimizely.com/hc/en-us

- critical-request-chainsok
Tested:
- https://support.optimizely.com/hc/en-us

- JavaScript execution timeok
Tested:
- https://support.optimizely.com/hc/en-us

- Minimizes main-thread workok
Tested:
- https://support.optimizely.com/hc/en-us

- Uses passive listeners to improve scrolling performanceok
Tested:
- https://support.optimizely.com/hc/en-us

- Javascript, avoids `document.write()ok
Tested:
- https://support.optimizely.com/hc/en-us

- Avoids long main-thread tasksok
Tested:
- https://support.optimizely.com/hc/en-us

- Has a <meta name="viewport"> tag with width or initial-scaleok
Tested:
- https://support.optimizely.com/hc/en-us

- Network Requestsok
Tested:
- https://support.optimizely.com/hc/en-us

- Network Round Trip Timesok
Tested:
- https://support.optimizely.com/hc/en-us

- Server Backend Latenciesok
Tested:
- https://support.optimizely.com/hc/en-us

- Main thread tasksok
Tested:
- https://support.optimizely.com/hc/en-us

- Diagnosticsok
Tested:
- https://support.optimizely.com/hc/en-us

- Metricsok
Tested:
- https://support.optimizely.com/hc/en-us

- Screenshot Thumbnailsok
Tested:
- https://support.optimizely.com/hc/en-us

- final-screenshotok
Tested:
- https://support.optimizely.com/hc/en-us

- script-treemap-dataok
Tested:
- https://support.optimizely.com/hc/en-us

- resource-summaryok
Tested:
- https://support.optimizely.com/hc/en-us

- first-meaningful-paintok
- Eliminate render-blocking resourcesok
- prioritize-lcp-imageok
- user-timingsok
- third-party-facadesok
- Largest Contentful Paint elementok
- lcp-lazy-loadedok
- Avoid large layout shiftsok
- non-composited-animationsok