Accessibility issues inside the pdf.js viewer were raised that may be exacerbated by product changes we’re soon to ship (we'll soon ship ability to open downloaded pdf documents inside pdf.js whereas it currently offers to open them with a third party viewer). We want a new KB article to explain options user shave to adjust pdf viewing accessibility to their needs.
Draft: https://docs.google.com/document/d/1VgW8qAK1Bei2UDXqoCcfJYXMQlz7C2qu6ya1DTbtDGg/edit

Hi Romain, I am a technical writer on the SUMO team, I can review your document. When would you like this to go live on the SUMO site?

Hi ANgela, this should go live as the blocking bug hits release (https://bugzilla.mozilla.org/show_bug.cgi?id=1191591) since this is when the behavior will be made available to users.

Hi Romain, I used your draft to help update the existing documentation on this. This page is now updated: https://support.mozilla.org/en-US/kb/different-ways-access-pdf-files-firefox

Let me know if you think further changes need to be made, thanks.

This looks great, thanks!