Skip to content
https://firebase.google.com

Accessibility

· 13 checks — Landmarks, headings, alt text, forms, and link quality rolled into one auditable list.
SCORE
74
GRADE
C
FIX
2
REVIEW
6
PASS
5
INFO
0
Checks
13
5 PASS 6 REVIEW 2 FIX
D
Print Stylesheet
Action
No print styles
FIX
No print styles
Info::
No print-specific styles detected
When users print this page, they get the screen layout including navigation and non-essential elements. Add @media print rules to hide navigation and optimize layout for paper.
Print Stylesheet No Print Styles
Print stylesheet Not found ✗Inline @media print Not detected ✗
F
Navigation UX
Action
1 navigation pattern(s)
FIX
1 navigation pattern(s)
Info::
Skip navigation link detected
Info::
7 navigation landmark(s) detected
Info::
Hamburger menu detected (responsive design)
Breadcrumbs
Search
Skip Link Skip link detected
Labeled Navigation 7 <nav> element(s)
Back to Top
Hamburger Menu
Sticky Navigation Cannot reliably detect (CSS-based)
3 of 6 testable patterns navigation patterns detected. Strong navigation UX with multiple discovery paths.
B
Landmark Structure
10 landmarks
REVIEW
10 landmarks
Info::
<main> landmark present
Warning::
Multiple <main> landmarks (2 found)
A page should have only one <main> landmark.
Info::
7 <nav> landmark(s) found
Warning::
1 of 7 <nav> elements are unlabeled
Multiple navigations need aria-label to distinguish them for screen readers.
Info::
No contentinfo (footer) landmark
Info::
Skip navigation link present
Page Structure — as a screen reader sees it
BANNER header NAV "Upper tabs" MAIN CONTENTINFO (missing!)

A page should have only one <main> landmark.

Why this matters

Multiple <main> elements violate the spec — there must be exactly one per page.

Learn more ▾

HTML5 spec: 'authors must not include more than one main element' visible to AT at the same time. Multiple <main>s confuse AT and break the 'jump to main content' shortcut. Refactor to a single <main> with nested <section>/<article>.

Source: HTML5 spec

Multiple navigations need aria-label to distinguish them for screen readers.

Why this matters

Some <nav> elements lack aria-label — screen-reader users hear 'navigation' multiple times with no way to distinguish them.

Learn more ▾

When a page has multiple <nav> regions (primary, footer, breadcrumb), each needs aria-label or aria-labelledby. AT users navigate by landmark; identical 'navigation' announcements force them to enter each one to discover purpose.

Source: WAI-ARIA Authoring Practices

B
404 Error Page
HTTP 404, custom page
REVIEW
HTTP 404, custom page
Info::
Correct 404 status code returned
Got: HTTP 404
Info::
Custom styled 404 page
Info::
Navigation links present on 404 page
Info::
Homepage link present on 404 page
404 Page Quality ✓ Custom 404 Page
Status Code HTTP 404 ✓Page Title 404  |  Page Not Found  |  Firebase ✓Custom Styling ✓Navigation ✓Homepage Link ✓Search Form ✗
B
Favicon & Branding
11 icon(s) detected
REVIEW
11 icon(s) detected
Info::
favicon.ico present at site root
Info::
HTML icon links detected
Info::
Apple touch icon present
Info::
Multiple icon sizes detected
✓ favicon.ico Present
✓ PNG Icons Present
✓ Apple Touch Present
✗ SVG Favicon Missing
✓ Manifest Icons Present
✓ Multiple Sizes Present
B
Dark Mode Support
Dark mode detected
REVIEW
Dark mode detected
Info::
Theme-color present but no dark variant
A theme-color is set but no dark-specific variant was found. The browser toolbar may not adapt for dark mode users.
Got: #a8c7fa
Info::
prefers-color-scheme CSS detected in inline styles
Info::
Detection limited to meta tags and inline styles
External CSS files may contain prefers-color-scheme rules not visible to this scan.
Dark Mode✓ Dark Mode Supported
color-scheme meta Not set ✗Dark theme-color Not set ✗CSS indicators Detected ✓

Detection limited to meta tags and inline styles.

C
Color Contrast (Screenshot)
Action
20 text elements analyzed, 18 fail WCAG AA
REVIEW

Analyzes text contrast against the actual rendered page, including background images, gradients, and overlays that CSS-based tools cannot detect.

2 pass 18 fail WCAG AA
h3 Easily integrate Firebase with Gemini an…
1.26:1
#000000
on
#1E1E1E
needs 3.0:1 (large text)
19px · bottom of viewport
h3 Easily integrate Firebase with your team…
1.26:1
#000000
on
#1E1E1E
needs 3.0:1 (large text)
19px · bottom of viewport
h3 Install pre-packaged, open source bundle…
1.26:1
#000000
on
#1E1E1E
needs 3.0:1 (large text)
19px · bottom of viewport
h3 Easy to integrate on iOS, Android, and t…
1.26:1
#000000
on
#1E1E1E
needs 3.0:1 (large text)
19px · bottom of viewport
h3 Keep up to date on everything Firebase
1.26:1
#000000
on
#1E1E1E
needs 3.0:1 (large text)
19px · bottom of viewport
h3 Next.js Deployment Adapters: A bright fu…
1.26:1
#000000
on
#1E1E1E
needs 3.0:1 (large text)
19px · bottom of viewport
h3 Beyond the Spinner: Building Responsive …
1.26:1
#000000
on
#1E1E1E
needs 3.0:1 (large text)
19px · bottom of viewport
h3 Getting started with Server Prompt Templ…
1.26:1
#000000
on
#1E1E1E
needs 3.0:1 (large text)
19px · bottom of viewport
h3 Trusted by the largest apps and games
1.26:1
#000000
on
#1E1E1E
needs 3.0:1 (large text)
19px · bottom of viewport
h3 Learn
1.26:1
#000000
on
#1E1E1E
needs 3.0:1 (large text)
19px · bottom of viewport
h3 Stay connected
1.26:1
#000000
on
#1E1E1E
needs 3.0:1 (large text)
19px · bottom of viewport
h3 Support
1.26:1
#000000
on
#1E1E1E
needs 3.0:1 (large text)
19px · bottom of viewport
a Build
1.26:1
#000000
on
#1E1E1E
needs 4.5:1 (normal text)
16px · top of page (header area)
li Build
1.26:1
#000000
on
#1E1E1E
needs 4.5:1 (normal text)
16px · top of page (header area)
li Get to market quickly and securely with …
1.26:1
#000000
on
#1E1E1E
needs 4.5:1 (normal text)
16px · above the fold
div Go to Build
1.26:1
#000000
on
#1E1E1E
needs 4.5:1 (normal text)
16px · above the fold
li Build Products
1.26:1
#000000
on
#1E1E1E
needs 4.5:1 (normal text)
16px · above the fold
div App Check
1.26:1
#000000
on
#1E1E1E
needs 4.5:1 (normal text)
16px · above the fold
Show all checked elements (20)
ElementRatioRequiredFGBGResult
h3 Easily integrate Fir…1.26:13.0:1
#000000
#1E1E1E
Fail
h3 Easily integrate Fir…1.26:13.0:1
#000000
#1E1E1E
Fail
h3 Install pre-packaged…1.26:13.0:1
#000000
#1E1E1E
Fail
h3 Easy to integrate on…1.26:13.0:1
#000000
#1E1E1E
Fail
h3 Keep up to date on e…1.26:13.0:1
#000000
#1E1E1E
Fail
h3 Next.js Deployment A…1.26:13.0:1
#000000
#1E1E1E
Fail
h3 Beyond the Spinner: …1.26:13.0:1
#000000
#1E1E1E
Fail
h3 Getting started with…1.26:13.0:1
#000000
#1E1E1E
Fail
h3 Trusted by the large…1.26:13.0:1
#000000
#1E1E1E
Fail
h3 Learn1.26:13.0:1
#000000
#1E1E1E
Fail
h3 Stay connected1.26:13.0:1
#000000
#1E1E1E
Fail
h3 Support1.26:13.0:1
#000000
#1E1E1E
Fail
title Firebase | Google's …21.00:14.5:1
#000000
#FFFFFF
Pass
a Skip to main content8.60:14.5:1
#000000
#A5A6A6
Pass
a Build1.26:14.5:1
#000000
#1E1E1E
Fail
li Build1.26:14.5:1
#000000
#1E1E1E
Fail
li Get to market quickl…1.26:14.5:1
#000000
#1E1E1E
Fail
div Go to Build1.26:14.5:1
#000000
#1E1E1E
Fail
li Build Products1.26:14.5:1
#000000
#1E1E1E
Fail
div App Check1.26:14.5:1
#000000
#1E1E1E
Fail

Methodology: The top 20 text elements by font size were checked. Background color was sampled from the desktop screenshot using a 5-point pattern. WCAG 2.1 AA requires 4.5:1 for normal text and 3:1 for large text.

A
Heading Hierarchy
17 headings, 1 skip(s)
PASS
17 headings, 1 skip(s)
Info::
Single H1 present
Warning::
Heading level skipped: H1 → H3 (missing H2)
Skipping heading levels breaks the document outline. Screen readers may interpret missing levels as structural errors.
  • H5 Get $300 to unlock all Firebase features
  • H1 Make your app the best it can be with Firebase and generative AI
  • H3 Easily integrate Firebase with Gemini and the latest AI technology from Google skipped
  • H3 Easily integrate Firebase with your team's favorite tools.
  • H3 Install pre-packaged, open source bundles of code to automate common development tasks
  • H3 Easy to integrate on iOS, Android, and the Web
  • H3 Keep up to date on everything Firebase
  • H3 Next.js Deployment Adapters: A bright future for Next.js on Google Cloud
  • H3 Beyond the Spinner: Building Responsive AI Apps with Genkit Streaming
  • H3 Getting started with Server Prompt Templates
  • H3 Trusted by the largest apps and games
  • H4 All Firebase products
  • H5 Build
  • H5 Run
  • H3 Learn
  • H3 Stay connected
  • H3 Support

Skipping heading levels breaks the document outline. Screen readers may interpret missing levels as structural errors.

Why this matters

Skipping heading levels breaks the document outline — screen-reader users lose track of section nesting.

Learn more ▾

Screen reader users navigate by jumping between headings (H1 → H2 → H3). Skipping (H1 → H3) breaks the sense of hierarchy. Use sequential levels even if you don't like the default styling — restyle with CSS instead. WCAG 1.3.1 (Info and Relationships) treats this as an A failure.

Source: WCAG 2.1 SC 1.3.1 / W3C WAI

A+
Alt Text Quality
All 48 images OK
PASS
All 48 images OK
Info::
3 decorative image(s) correctly marked
Info::
45 image(s) with good alt text
48 images 45 good alt text 3 decorative
All images have appropriate alt text.
A+
Form Accessibility
All 2 controls labeled
PASS
All 2 controls labeled
Info::
2 control(s) properly labeled
2 controls
2 labeled
0 placeholder only
0 unlabeled
ControlTypeLabelMethod
qtextSearcharia-label
inputtextType to filteraria-label
A+
Web Manifest
PWA-ready
PASS
PWA-ready
Info::
Meets PWA install criteria
Info::
Name present: Firebase
Info::
192x192 icon present
Info::
512x512 icon present
Info::
Display mode: standalone
PWA Install Criteria ✓ Installable
Name Firebase ✓192×192 icon ✓512×512 icon ✓Start URL / ✓Display Mode standalone ✓
Name Firebase Display Mode standalone Theme Color #039be5 Background Color #fff Icons 8 icon(s)
A+
Lighthouse Accessibility Audits
Score 96/100 — 2 failing, 31 passed
PASS
96

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.

Names and labels

Screen reader users rely on frame titles to describe the contents of frames. Learn more about frame titles.

Why this matters

Performance issues directly impact user engagement and conversion rates.

Failing Elements
div > div.code-picker > devsite-iframe > iframe div > div.code-picker > devsite-iframe > iframe

These are opportunities to improve the semantics of the controls in your application. This may enhance the experience for users of assistive technology, like a screen reader.

Navigation

Properly ordered headings that do not skip levels convey the semantic structure of the page, making it easier to navigate and understand when using assistive technologies. Learn more about heading order.

Why this matters

Performance issues directly impact user engagement and conversion rates.

Failing Elements
Easily integrate Firebase with Gemini and the latest AI technology from Google div.highlights-row-wrapper > div.highlights-row__content > div.content > h3#easily-integrate-firebase-with-gemini-and-the-latest-ai-technology-from-google

These are opportunities to improve keyboard navigation in your application.

○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
●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
●`[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
●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
●`[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 are distinguishable without relying on color.
●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
●Touch targets have sufficient size and spacing.
●Skip links are focusable.
●Document has a main landmark.
●Deprecated ARIA roles were not used
●Uses ARIA roles only on compatible elements
●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
○Elements with `role="dialog"` or `role="alertdialog"` have accessible names.
○ARIA input fields have accessible names
○ARIA `meter` elements have accessible names
○ARIA `progressbar` elements have accessible names
○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
○`<html>` element has an `[xml:lang]` attribute with the same base language as the `[lang]` attribute.
○Input buttons have discernible text.
○`<input type="image">` elements have `[alt]` text
○The document does not use `<meta http-equiv="refresh">`
○`<object>` elements have alternate text
○Select elements have associated label elements.
○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.
○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.
All checks on this page are automated. Results are estimates - run targeted manual reviews when the score affects a release decision.

Send Feedback