[Bug]: Accessibility support in the PDF.js web viewer (web/viewer.html)

[Karthikvenkat86]

Attach (recommended) or Link to PDF file

I’m assessing accessibility support in the PDF.js web viewer (web/viewer.html). Currently, all text—including headers—is rendered as plain elements, without semantic roles like role="heading" or aria-level. Are there UI settings I’m missing, or is this a known limitation/bug in the viewer?

As of now, its generates a Header where screen reader cannot identify this as a header.

Web browser and its version

Edge

Operating system and its version

Windows 11

PDF.js version

v5.3.93

Is the bug present in the latest PDF.js version?

Yes

Is a browser extension

No

Steps to reproduce the problem

Generate a browser version of PDF and header doesn't have proper roles.

https://matrix.to/#/!NofDvGEWAARHltVRTj:mozilla.org/$-0tsHB06haPW340J8k8XD_HcJd0879uftHG-LhtN-C0?via=mozilla.org&via=matrix.org&via=igalia.com

What is the expected behavior?

Need proper accessiblity label and roles for every element.

If its header then role=header, if its table then role="table"

What went wrong?

No proper roles

Link to a viewer

its private

Additional context

No response

[menturion]

Same here, v5.3.93.