User agent reliability for NVDA Firefox Screen reader compatibility

Shows how well NVDA Firefox supports ARIA and WCAG sufficient techniques.

Latest version tested

NVDA 2024.4 with FF 128

• All tests: 114 pass of 125 tests (91%)
• ARIA tests: 44 pass of 47 tests (94%)
• WCAG tests: 79 pass of 86 tests (92%)

Reliability trend

Filter results: All testsARIA testsWCAG tests

Failing tests

	Test	Mode	What the user hears	Notes
	Page with xml:lang set on the html and p elements	Reading	Act-if tay-bill. Ray-day-oh.	Pronounced as English. Ignores xml:lang.
	application/xhtml+xml page with mismatching lang and xml:lang on the html element	Reading	Ga-raj. Doo-ble. Damm. Un, zwoy, dry-i.	Speech pronounced as lang=fr, but CSS matches :lang(de) and German CSS content pronounced as French.
	Match lang subtags	Reading	Dam-he. Dam-he. Daim.	lang=de and lang=de-DE pronounced as German, lang=de-AT pronounced as English.
	audio with aria-label attribute	Reading	Nothing	Nothing voiced for audio - no indication it exists
	audio with aria-labelledby attribute	Reading	Nothing	Nothing voiced for audio - no indication it exists
	audio with title attribute	Reading	Nothing	Nothing voiced for audio - no indication it exists
	abbr with title	Reading	T L N	ABBR expansion ignored in screen reader, available to sighted users as dotted underline tooltip links in browser.
	area with title attribute	Reading	This is alt text, graphic, this is alt text, link, slash left arrow dot HTM. This is alt text, graphic link, slash right arrow dot HTM.	Link URLs read out instead of link title
	area with title attribute	Tabbing	Slash left arrow dot HTM, link, this is alt text, graphic. Slash right arrow dot HTM, link, this is alt text, graphic.	Link URLs read out each time user tabs.
	Data table with role=columnheader headers but no th	Reading	Morning. Afternoon. Free. Busy.	Table treated as layout table - not announced as table, and no headers read.
	PDF19 Phrase language set to German	Reading	Rah-di-oh	Pronounced as French, using document language, phrase language ignored

Passing tests

	Test	Mode	What the user hears	Notes
	Page with lang set on the html and p elements	Reading	Act-eef tab-le. Rah-di-oh.	Pronounced as French and German.
	text/html page with mismatching lang and xml:lang on the html element	Reading	Ga-raj. Doo-ble. Damm. Un, deux, trois.	Speech pronounced as lang=fr, and CSS matches :lang(fr).
	ARIA role=heading	Heading	First level heading, heading level 1. Second level heading, heading level 2.
	Heading is img with alt	Heading	Second level alt, graphic heading level 2.
	applet with title attribute	Reading	Nothing	Firefox 52 removed applet support in 2017, and doesn't render applet on screen unless applet has fallback content
	applet with fallback content	Reading	Fallback content for applet	Firefox 52 removed applet support in 2017, and doesn't render applet on screen unless applet has fallback content
	applet with aria-label attribute	Reading	Nothing	Firefox 52 removed applet support in 2017, and doesn't render applet on screen unless applet has fallback content
	applet with aria-labelledby attribute	Reading	Nothing	Firefox 52 removed applet support in 2017, and doesn't render applet on screen unless applet has fallback content
	applet inside figure with figcaption element	Reading	Figure caption, figure caption for applet. Out of caption, out of figure.	Firefox 52 removed applet support in 2017, and doesn't render applet on screen unless applet has fallback content
	embed with title attribute	Reading	Title text for embed, frame button play. Button mute. Blank. Out of frame, blank.
	embed inside figure with figcaption	Reading	Figure frame, button play. Button mute. Blank. Out of frame, blank. Caption, figure caption for embed. Out of caption, out of figure.
	embed with aria-label attribute	Reading	ARIA label for embed, frame, button play. Button mute. Blank. Out of frame, blank.
	embed with aria-labelledby attribute	Reading	This is ARIA-LABELLEDBY text, frame, button play. Button mute. Blank. Out of frame, blank.
	object with fallback content	Reading	Fallback content for object.	Flash is no longer supported by Firefox.
	object with title attribute	Reading	Nothing	Nothing displayed on screen and nothing voiced for object
	object with aria-label attribute	Reading	Nothing	Nothing displayed on screen and nothing voiced for object
	object with aria-labelledby attribute	Reading	Nothing	Nothing displayed on screen and nothing voiced for object
	video with aria-label attribute	Reading	Video aria label, grouping, out of grouping.
	video with aria-labelledby attribute	Reading	This is ARIA-LABELLEDBY text, grouping, out of grouping
	video with title attribute	Reading	Video title grouping, out of grouping.
	a element placeholder link with no event handler or href attribute	Reading	Placeholder text
	a element placeholder link with no event handler or href attribute	Tabbing	Nothing	Skipped when tabbing, as expected
	iframe with fallback content	Reading	Frame, this is an, link, example hyperlink in the target page. Out of frame, blank.	Fallback content is ignored
	iframe with fallback content	Tabbing	Frame, example hyperlink, link.
	iframe with title attribute	Reading	This is an IFRAME title, frame, this is an, link, example hyperlink in the target page. Out of frame, blank.
	iframe with title attribute	Tabbing	This is an iframe title, frame, example hyperlink, link.
	Interactive iframe with role=presentation and no accessible name	Reading	This is a link, example hyperlink, in the target page.	role=presentation makes frame seamless
	Interactive iframe with role=presentation and no accessible name	Tabbing	Example hyperlink, link
	Interactive iframe with role=presentation and title attribute	Reading	This is frame title, frame, this is an, visited link, example hyperlink, in the target page.
	Interactive iframe with role=presentation and title attribute	Tabbing	This is frame title, frame, example hyperlink, visited link.
	Interactive iframe with role=presentation and aria-label attribute	Reading	This is aria-label, frame, this is an, visited link, example hyperlink, in the target page.
	Interactive iframe with role=presentation and aria-label attribute	Tabbing	This is aria-label, frame, example hyperlink, visited link.
	button containing img with alt	Reading	Button graphic, this is image alt
	button containing img with alt	Tabbing	This is image alt, graphic button
	button containing img with title attribute	Reading	Button graphic, this is image title.
	button containing img with title attribute	Tabbing	This is image title, graphic button.
	button containing img with aria-label	Reading	Button graphic, this is image aria label.
	button containing img with aria-label	Tabbing	This is image aria label, graphic button.
	button containing img with aria-labelledby	Reading	Button graphic, this is an aria labelled by, this is an aria labelled by
	button containing img with aria-labelledby	Tabbing	This is an aria labelled by, graphic button.
	button with title containing img with null alt	Reading	Button, this is button title
	button with title containing img with null alt	Tabbing	This is button title, button
	button with aria-label containing img with null alt	Reading	Button, this is button aria label
	button with aria-label containing img with null alt	Tabbing	This is button aria label, button
	input type=image with alt	Reading	Button, this is image button alt text
	input type=image with alt	Tabbing	This is image button alt text, button
	input type=image with title attribute	Reading	Button, this is image button title text
	input type=image with title attribute	Tabbing	This is image button title text, button
	input type=image with aria-label attribute	Reading	Button, this is image button aria label text
	input type=image with aria-label attribute	Tabbing	This is image button aria label text, button
	input type=image with aria-labelledby attribute	Reading	Button, this is image button aria labelled by text, this is image button aria labelled by text
	input type=image with aria-labelledby attribute	Tabbing	This is image button aria labelled by text, button
	input type=text with aria-describedby attribute	Reading	Clickable, first name, edit has auto complete, a bit of instructions for this field linked with aria describedby
	input type=text with aria-describedby attribute	Tabbing	First name, edit, has auto complete, a bit of instructions for this field linked with aria describedby, blank
	input type=text with title attribute	Reading	Enter search text, edit has auto complete
	input type=text with title attribute	Tabbing	Enter search text, edit, has auto complete, blank
	input type=text with aria-label attribute	Reading	Enter search text, edit has auto complete
	input type=text with aria-label attribute	Tabbing	Enter search text, edit, has auto complete, blank
	input type=text with aria-labelledby attribute	Reading	Enter search text, edit has auto complete
	input type=text with aria-labelledby attribute	Tabbing	Enter search text, edit, has auto complete, blank
	input type=text with label for	Reading	Clickable, enter search text, edit has auto complete
	input type=text with label for	Tabbing	Enter search text, edit, has auto complete, blank
	input type=text inside label with text before control	Reading	Clickable, enter search text, edit has auto complete
	input type=text inside label with text before control	Tabbing	Article, enter search text, edit has auto complete, blank
	input type=text inside label with text after control	Reading	Clickable, edit has auto complete, enter search text
	input type=text inside label with text after control	Tabbing	Article, enter search text, edit has auto complete, blank
	input type=text inside label with text before and after control	Reading	Clickable, enter search text, edit has auto complete, blanks not allowed
	input type=text inside label with text before and after control	Tabbing	Article, enter search text, blanks not allowed, edit has auto complete, blank
	fieldset containing links	Reading	Legend for enclosed links grouping, legend for enclosed links. Link home, link about, link contact. Out of grouping.
	fieldset containing links	Tabbing	Legend for enclosed links, grouping, home link. About link. Contact link.
	Yes/No radio buttons inside fieldset element	Reading	I agree to terms and conditions grouping, I agree to terms and conditions. Clickable radio button checked, yes, clickable radio button not checked, no. Out of grouping, sign me up to the newsletter grouping, sign me up to the newsletter. Clickable radio button checked, yes, clickable radio button not checked, no. Out of grouping.
	Yes/No radio buttons inside fieldset element	Tabbing	I agree to terms and conditions grouping, yes radio button checked, one of two. Sign me up to the newsletter grouping, yes radio button checked, one of two.
	img with null alt	Reading	Nothing	Ignored as expected
	img with alt	Reading	Graphic, this is alt text
	img with figcaption	Reading	Figure caption, Violet, taken on 12/11/2010. Out of caption, out of figure.
	img with title	Reading	Graphic, this is title text
	img with aria-label	Reading	Graphic, this is an aria label
	img with aria-labelledby	Reading	Graphic, this is an aria labelled by, this is an aria labelled by
	area and img with alt attributes	Reading	This is alt text, graphic, this is alt text, link this is left alt text, link this is right alt text
	area and img with alt attributes	Tabbing	This is left alt text, link, this is alt text graphic. This is right alt text, link, this is alt text graphic
	area with alt attribute and img with null alt	Reading	Graphic link, this is left alt text, link, this is right alt text.
	area with alt attribute and img with null alt	Tabbing	This is left alt text, link graphic. This is right alt text, link graphic.
	area with aria-label attribute	Reading	This is alt text, graphic, this is alt text link, this is left aria label text, link, this is right aria label text.
	area with aria-label attribute	Tabbing	This is left aria label text, link, this is alt text, graphic. This is right aria label text, link, this is alt text, graphic
	area with aria-labelledby attribute	Reading	This is alt text, graphic, this is alt text link, this is left aria labelled by text, link, this is right aria labelled by text.
	area with aria-labelledby attribute	Tabbing	This is left aria labelled by text, link, this is alt text graphic. This is right aria labelled by text, link, this is alt text graphic.
	Link containing img with alt	Reading	Link graphic, this is a link alt
	Link containing img with alt	Tabbing	This is a link alt, graphic link
	Link containing img with title	Reading	Link graphic, this is an image title
	Link containing img with title	Tabbing	This is an image title, graphic link
	Click Here link with title attribute	Reading	Link, click here
	Click Here link with title attribute	Tabbing	Click here link, this is a link title
	Link text replaced by aria-label attribute	Reading	Link, this is an aria label
	Link text replaced by aria-label attribute	Tabbing	This is an aria label, link
	Link text replaced by aria-labelledby attribute	Reading	Link, this is an aria labelled by, this is an aria labelled by
	Link text replaced by aria-labelledby attribute	Tabbing	This is an aria labelled by, link
	Click Here link with aria-describedby attribute	Reading	Link click here, this is an aria described by
	Click Here link with aria-describedby attribute	Tabbing	Click here link, this is an aria described by
	Layout table with single cell	Reading	This is some text.	Treated as a layout table.
	Layout table with role=presentation	Reading	Example. Navigation. Links. Content.	Table treated as layout table - not announced as table.
	Data table with role=grid	Reading	Table with two rows and two columns, row one column one, morning. Column two afternoon. Row two, morning, column one, free. Afternoon, column two, busy.
	Data table with role=table	Reading	Table with 1 rows and 1 columns. Row 1, columns 1, this is some text.
	Data table with summary and th	Reading	Table with two rows and two columns, data table summary. Row one column one, morning. Column two, afternoon. Row two, morning, column one, free. Afternoon, column two, busy.
	Data table with caption and th	Reading	Table with two rows and two columns, data table caption. Caption, data table caption. Out of caption, row one column one, morning. Column two afternoon. Row two, morning, column one, free. Afternoon, column two, busy.
	Data table with th cell headers	Reading	Table with two rows and two columns, row one, column one, morning. Column two, afternoon. Row two, morning, column one, free. Afternoon, column two, busy.
	Data table with th scope on cell headers	Reading	Table with 4 rows and 5 columns, contact information. Caption, contact information. Out of caption row 1, column 1. Column 2, name. Column 3, phone number. Column 4, fax number. Column 5, city. Row 2, column 1, one. Name, column 2, Joel Garner. Phone number, column 3, 412 212 5421. Fax number, column 4, 412 212 5400. City, column 5, Pittsburgh	Column headers, but no row headers, announced for TD cells in reading mode, but row headers are announced when using table navigation commands.
	Data table with td headers attribute	Reading	Table with 3 rows and 7 columns, row 1 through 2 column 1, homework. Row 1 column 2 through 4, exams. Column 5 through 7, projects. Row 2, exams, column 2, one. Exams, column 3, two. Exams, column 4, final. Projects, column 5, one. Projects, column 6, two. Projects, column 7, final. Row 3, homework, column 1, fifteen percent. Exams one, column 2, fifteen percent. Exams two, column 3, fifteen percent. Exams final, column 4, twenty percent. Projects one, column 5, ten percent. Projects two, column 6, ten percent. Projects final, column 7, fifteen percent.	Headers associated with the cell read out before column number.
	PDF18 Document with doc title	Reading	This is document title - SR_PDF_doc_title.pdf	Voices PDF document title, and filename part of URL.
	PDF9 Document with headings	Reading	Heading level 1, heading 1. Heading level 2, heading 1.2
	PDF1 Image with alt text	Reading	This is alt text, figure
	PDF4 Decorative image marked as artifact	Reading	Nothing	Image ignored as expected
	PDF16 Document default language set to French	Reading	Act-eef tab-le	Document pronounced as French, document language applied
	PDF6 Table with header markup	Reading	Table with 2 rows and 2 columns, column 1, morning. Column 2, afternoon. Row 2, morning column 1, free. Afternoon column 2, busy. Out of table
	PDF6 Table with header markup and alt text	Reading	Table with 2 rows and 2 columns, alt description for table. Row 1, column 1, morning. Column 2, afternoon. Row 2, morning, column 1, free. Afternoon, column 2, busy. Out of table