[a11y] /privacy page accessibility improvements

[alexgibson]

Axe-core® Accessibility Results for /en-US/privacy/

Page URL: https://www-dev.allizom.org/en-US/privacy/

axe-core found 4 violations

#	Description	Axe rule ID	WCAG	Impact	Count
1	Elements must only use supported ARIA attributes	aria-allowed-attr	WCAG 2 Level A, WCAG 4.1.2	critical	1
2	Heading levels should only increase by one	heading-order	Best practice	moderate	1
3	All page content should be contained by landmarks	region	Best practice	moderate	2

Failed

1. Elements must only use supported ARIA attributes

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aria-allowed-attr

WCAG 2 Level A, WCAG 4.1.2

Ensure an element's role supports its ARIA attributes

critical

Issue Tags: cat.aria wcag2a wcag412 EN-301-549 EN-9.4.1.2

#	Issue Description	To solve this violation, you need to...
1	Element location <br>.mzp-c-sidemenu-main<br> Element source <br><section class="mzp-c-sidemenu-main" aria-expanded="false"><br>	Fix all of the following: * ARIA attribute is not allowed: aria-expanded="false"

2. Heading levels should only increase by one

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heading-order

Best practice

Ensure the order of headings is semantically correct

moderate

Issue Tags: cat.semantics best-practice

#	Issue Description	To solve this violation, you need to...
1	Element location <br>#contact > h4<br> Element source <br><h4>Contact Mozilla</h4><br>	Fix any of the following: * Heading order invalid

3. All page content should be contained by landmarks

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region

Best practice

Ensure all page content is contained by landmarks

moderate

Issue Tags: cat.keyboard best-practice

#	Issue Description	To solve this violation, you need to...
1	Element location <br>header<br> Element source <br><header><br>	Fix any of the following: * Some page content is not contained by landmarks
2	Element location <br>.privacy-footnote<br> Element source <br><footer class="privacy-footnote"><br>	Fix any of the following: * Some page content is not contained by landmarks