Webperf result optimizely.blog

Standards section:
- Page not found, no valid title foundwarning
Tested:
- https://optimizely.blog/e356c/finns-det-en-sida/pa-den-har-adressen/testanrop/

- Page not found, has expected 404 responseok
- Page not found, valid h1 header foundok
- Page not found, valid text foundok
- Page not found, valid text foundok
- Page not found, valid 404 response status code usedok
- Page not found, used supported localeok
- Page not found, valid body text foundok
- Page not found, network is usableok

Security section:
- Sitemap, Url in <loc> has to start with https://ok
- security.txt is missingok
- security.txt has incorrect contentok
- security.txt is missing the required contact infook
- security.txt requires expiration information (added in draft v10) is missingok

Standards section:
- Sitemap, Url in <loc> must use same domain as robots.txtwarning
Tested:
- https://optimizely.blog/

- 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, No duplicate Urls in <loc> allowedok
- Sitemap, lists other stuff then webpagesok
- Sitemap, is exceeding 50 000 itemsok
- Sitemap, has no itemsok
- Feed is missing in the HTML's metadataok

Performance section:
- [desktop] TTFB (Time to First Byte): 90.50ms, ±14.50ms 5.00
- [desktop] DOMContentLoaded: 301.00ms, ±5.00ms 5.00
- [desktop] LCP (Largest Contentful Paint): 394.00ms, ±14.00ms 5.00
- [desktop] Load: 453.00ms, ±21.00ms 5.00
- [desktop] CLS (Cumulative Layout Shift): 0.00ms, ±0.00ms 5.00
- [desktop] FirstVisualChange: 416.50ms, ±16.50ms 5.00
- [desktop] SpeedIndex: 418.00ms, ±17.00ms 5.00
- [desktop] VisualComplete85: 416.50ms, ±16.50ms 5.00
- [desktop] TBT (Total Blocking Time): 21.00ms, ±7.00ms 5.00
- [desktop] FCP (First Contentful Paint): 394.00ms, ±0.00ms 5.00
- [desktop] firstPaint: 394.00ms, ±14.00ms
- [desktop] LastVisualChange: 499.50ms, ±33.50ms
- [mobile] TTFB (Time to First Byte): 78.00ms, ±6.00ms 5.00
- [mobile] DOMContentLoaded: 328.00ms, ±17.00ms 5.00
- [mobile] LCP (Largest Contentful Paint): 346.00ms, ±6.00ms 5.00
- [mobile] Load: 431.67ms, ±20.33ms 5.00
- [mobile] FirstVisualChange: 334.00ms, ±0.00ms 5.00
- [mobile] SpeedIndex: 339.50ms, ±0.50ms 5.00
- [mobile] VisualComplete85: 334.00ms, ±0.00ms 5.00
- [mobile] FCP (First Contentful Paint): 346.00ms, ±0.00ms 5.00
- [mobile] CLS (Cumulative Layout Shift): 0.00ms, ±0.00ms 5.00
- [mobile] TBT (Total Blocking Time): 0.00ms, ±0.00ms 5.00
- [mobile] firstPaint: 346.00ms, ±6.00ms
- [mobile] LastVisualChange: 767.00ms, ±0.00ms

Accessibility section:
- Img element missing an alt attribute. Use the alt attribute to specify a short text alternative.error
Tested:
- https://optimizely.blog/

- About average privacy settings, but should get better.

Security section:
- HTTPS by default is good! 5.00
- HTTP Strict Transport Security HSTS is good! 5.00
- Content Security Policy is pretty bad. 1.00
- Reporting CSP Certificate Transparency Network Error Logging is good! 5.00
- Referrer Policy is good! 5.00
- Subresource Integrity SRI is pretty bad. 1.00
- HTTP headers is good! 5.00
- Cookies is ok, with 2 error(s) and 0 warning(s). 4.00

- Webpage generates very little carbon dioxide!
- Carbon dioxide per pageview: 0.9 gram(s)
- More green than 90 % of the websites tested by webperf.se (Reference updated: 2026-06-07).
- Network transfer size: 1.42 MB 4.50

- CMS used: episerver
- Web server used: microsoft-httpapi
- Technology used: asp.net, csharp, js, sass, scss, typescript
- Metadata used: canonical, icon, open-graph, preload, viewport
- Javascript libraries used: applicationinsights-js, bootstrap, jquery, plausible-analytics
- Languages found: en, en_us
- Image formats used: ico, png, svg, webp

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

Security section:
##### Software is behind >=25 versions 2.75

###### Introduction:
Software used is behind 25 or more version compared to latests.
This is a good indicator that you need to update to latest version.
It also indicate that you don't have a good package routine for your software.
You can fix this by updating software to latest version.

###### Detected software(s):
- applicationinsights-js 2.8.18

###### Affected resource(s):
- https://az416426.vo.msecnd.net/scripts/b/ai.2.min.js
##### Software is behind >=10 versions 3.0

###### Introduction:
Software used is behind 10 or more version compared to latests.
This is a semi good indicator that you need to update to latest version.
It also indicate that you don't have a good package routine for your software.
You can fix this by updating software to latest version.

###### Detected software(s):
- bootstrap 5.0.2

###### Affected resource(s):
- https://optimizely.blog/js/jsbundle.js?v=fk4HzviiBW3ne4XYpew_Fq6m-skS716cfmb8rgo_rMI
##### Software is behind >=1 versions 4.9

###### Introduction:
Software used is behind 1 or more version compared to latests.
This is a small indicator that you need to update to latest version.
You can fix this by updating software to latest version.

###### Detected software(s):
- jquery 3.6.0

###### Affected resource(s):
- https://optimizely.blog/js/jsbundle.js?v=fk4HzviiBW3ne4XYpew_Fq6m-skS716cfmb8rgo_rMI
##### NO Common Vulnerabilities and Exposures found 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 values for properties within declarationserror
More info:
- https://stylelint.io/user-guide/rules/declaration-property-value-no-unknown

Tested:
- https://optimizely.blog/css/main.css?1.2.1.0

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

Tested:
- https://optimizely.blog/css/main.css?1.2.1.0

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

Tested:
- https://optimizely.blog/css/main.css?1.2.1.0

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

Tested:
- https://optimizely.blog/css/main.css?1.2.1.0

- 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 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 deprecated media typesok
More info:
- https://stylelint.io/user-guide/rules/media-type-no-deprecated

- 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 invalid position declarationsok
More info:
- https://stylelint.io/user-guide/rules/no-invalid-position-declaration

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

- selector-no-deprecatedok
More info:
- https://stylelint.io/user-guide/rules/selector-no-deprecated

- selector-no-invalidok
More info:
- https://stylelint.io/user-guide/rules/selector-no-invalid

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

Tested:
- https://optimizely.blog/
- https://az416426.vo.msecnd.net/scripts/b/ai.2.min.js

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

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

Standards section:
- no-debuggerok
More info:
- https://eslint.org/docs/latest/rules/no-debugger

- Performance only 1.75
- Accessibility only 4.50

- Images lack alternative text for screen readerserror
Tested:
- https://optimizely.blog/

- The page uses a secure connection (HTTPS)ok
Tested:
- https://optimizely.blog/

- geolocation-on-startok
Tested:
- https://optimizely.blog/

- notification-on-startok
Tested:
- https://optimizely.blog/

- csp-xssok
Tested:
- https://optimizely.blog/

- trusted-types-xssok
Tested:
- https://optimizely.blog/

- paste-preventing-inputsok
Tested:
- https://optimizely.blog/

- image-aspect-ratiook
Tested:
- https://optimizely.blog/

- Images look sharp at the right resolutionok
Tested:
- https://optimizely.blog/

- doctypeok
Tested:
- https://optimizely.blog/

- charsetok
Tested:
- https://optimizely.blog/

- js-librariesok
Tested:
- https://optimizely.blog/

- deprecationsok
Tested:
- https://optimizely.blog/

- third-party-cookiesok
Tested:
- https://optimizely.blog/

- errors-in-consoleok
Tested:
- https://optimizely.blog/

- valid-source-mapsok
Tested:
- https://optimizely.blog/

- The browser reports no problems on the pageok
Tested:
- https://optimizely.blog/

- is-crawlableok
Tested:
- https://optimizely.blog/

- The page has a titleok
Tested:
- https://optimizely.blog/

- meta-descriptionok
Tested:
- https://optimizely.blog/

- http-status-codeok
Tested:
- https://optimizely.blog/

- link-textok
Tested:
- https://optimizely.blog/

- crawlable-anchorsok
Tested:
- https://optimizely.blog/

- robots-txtok
Tested:
- https://optimizely.blog/

- hreflangok
Tested:
- https://optimizely.blog/

- canonicalok
Tested:
- https://optimizely.blog/

- Insecure traffic (HTTP) is forwarded to secure (HTTPS)ok
- has-hstsok
- origin-isolationok
- clickjacking-mitigationok
- structured-dataok

Accessibility section:
- Images lack alternative text for screen readerserror
Tested:
- https://optimizely.blog/

- Accessibility markup (ARIA) fits the elements it's onok
Tested:
- https://optimizely.blog/

- Accessibility markup (ARIA) is used according to the rulesok
Tested:
- https://optimizely.blog/

- The page is not hidden from screen readersok
Tested:
- https://optimizely.blog/

- Elements only have allowed accessibility markup (ARIA)ok
Tested:
- https://optimizely.blog/

- Accessibility markup (ARIA) has valid valuesok
Tested:
- https://optimizely.blog/

- Accessibility markup (ARIA) is correctly spelled and validok
Tested:
- https://optimizely.blog/

- Buttons have a name a screen reader can read outok
Tested:
- https://optimizely.blog/

- Text has enough contrast against the backgroundok
Tested:
- https://optimizely.blog/

- The page has a titleok
Tested:
- https://optimizely.blog/

- The headings are in the right orderok
Tested:
- https://optimizely.blog/

- The page states which language it's written inok
Tested:
- https://optimizely.blog/

- The page's language setting is validok
Tested:
- https://optimizely.blog/

- labelok
Tested:
- https://optimizely.blog/

- Links can be told apart even without colorok
Tested:
- https://optimizely.blog/

- Links have text describing where they gook
Tested:
- https://optimizely.blog/

- Lists contain only list itemsok
Tested:
- https://optimizely.blog/

- List items sit inside a real listok
Tested:
- https://optimizely.blog/

- Visitors can zoom on the pageok
Tested:
- https://optimizely.blog/

- skip-linkok
Tested:
- https://optimizely.blog/

- tabindexok
Tested:
- https://optimizely.blog/

- Tap targets are big enough and spaced apartok
Tested:
- https://optimizely.blog/

- landmark-one-mainok
Tested:
- https://optimizely.blog/

- identical-links-same-purposeok
Tested:
- https://optimizely.blog/

- accesskeysok
- aria-command-nameok
- No outdated accessibility roles (ARIA) are usedok
- aria-dialog-nameok
- Hidden elements can't be reached with the keyboardok
- aria-input-field-nameok
- aria-meter-nameok
- aria-progressbar-nameok
- Elements have the required accessibility markup (ARIA)ok
- Elements have the child elements accessibility tools requireok
- Elements are inside the parent element accessibility tools requireok
- Accessibility roles (ARIA) have valid valuesok
- aria-textok
- aria-toggle-field-nameok
- aria-tooltip-nameok
- aria-treeitem-nameok
- bypassok
- definition-listok
- dlitemok
- duplicate-id-ariaok
- form-field-multiple-labelsok
- frame-titleok
- html-xml-lang-mismatchok
- input-button-nameok
- input-image-altok
- meta-refreshok
- object-altok
- select-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
- table-duplicate-nameok
- empty-headingok
- Accessibility roles (ARIA) are used only on elements that support themok
- Images' alternative text doesn't repeat text that's already next to themok
- label-content-name-mismatchok
- table-fake-captionok
- td-has-headerok

Performance section:
- forced-reflow-insighterror
Tested:
- https://optimizely.blog/

- The main image can be found faster by the browsererror
Tested:
- https://optimizely.blog/

- Files load in a chain that slows the page downerror
Tested:
- https://optimizely.blog/

- Some files hold things up when the page is about to showerror
Tested:
- https://optimizely.blog/

- Remove design code (CSS) that isn't used so the page loads fastererror
Tested:
- https://optimizely.blog/

- Remove program code (JavaScript) that isn't used so the page loads fastererror
Tested:
- https://optimizely.blog/

- It takes a long time before anything appears on the pagewarning
Tested:
- https://optimizely.blog/

- cache-insighterror
Tested:
- https://optimizely.blog/

- The images can be delivered more smartly so they load fasterwarning
Tested:
- https://optimizely.blog/

- The program code (JavaScript) can be compressed so the page loads fasterwarning
Tested:
- https://optimizely.blog/

- Images have no set size, which makes the page jumpwarning
Tested:
- https://optimizely.blog/

- The page's main content appears quicklyok
Tested:
- https://optimizely.blog/

- The page responds quickly to clicksok
Tested:
- https://optimizely.blog/

- Content stays still while the page loadsok
Tested:
- https://optimizely.blog/

- The page looks finished loading quicklyok
Tested:
- https://optimizely.blog/

- Nothing makes the content jump aroundok
Tested:
- https://optimizely.blog/

- The page itself is fetched quicklyok
Tested:
- https://optimizely.blog/

- The page is reasonably complexok
Tested:
- https://optimizely.blog/

- Program code (JavaScript) isn't loaded twiceok
Tested:
- https://optimizely.blog/

- Text stays visible while fonts loadok
Tested:
- https://optimizely.blog/

- lcp-breakdown-insightok
Tested:
- https://optimizely.blog/

- No old-style program code is sent unnecessarilyok
Tested:
- https://optimizely.blog/

- Code from other sites doesn't affect performance muchok
Tested:
- https://optimizely.blog/

- The page displays well on mobileok
Tested:
- https://optimizely.blog/

- The page can be used quicklyok
Tested:
- https://optimizely.blog/

- The page responds quickly to the visitor's first clickok
Tested:
- https://optimizely.blog/

- The design code (CSS) is compressedok
Tested:
- https://optimizely.blog/

- The page loads a reasonable amount of dataok
Tested:
- https://optimizely.blog/

- The program code (JavaScript) runs quicklyok
Tested:
- https://optimizely.blog/

- The browser doesn't have to work too hard on the pageok
Tested:
- https://optimizely.blog/

- No tasks lock up the page for longok
Tested:
- https://optimizely.blog/

- Everything the page fetches from the networkok
Tested:
- https://optimizely.blog/

- How long data takes to travel back and forth on the networkok
Tested:
- https://optimizely.blog/

- Delay in the server before it respondsok
Tested:
- https://optimizely.blog/

- Tasks the browser performs for the pageok
Tested:
- https://optimizely.blog/

- Technical information about the pageok
Tested:
- https://optimizely.blog/

- Measurements of the page's performanceok
Tested:
- https://optimizely.blog/

- Small images of how the page loadsok
Tested:
- https://optimizely.blog/

- Image of the page once it finished loadingok
Tested:
- https://optimizely.blog/

- Overview of the page's program codeok
Tested:
- https://optimizely.blog/

- Summary of what the page fetchesok
Tested:
- https://optimizely.blog/

- Visitors aren't sent on unnecessarilyok
Tested:
- https://optimizely.blog/

- The server responds quicklyok
Tested:
- https://optimizely.blog/

- Content doesn't move suddenlyok
Tested:
- https://optimizely.blog/

- inp-breakdown-insightok
- user-timingsok
- non-composited-animationsok