#13683 Fix transformations when painting image masks and tiling patterns.
#13687 XFA - Don't fail xfa loading because of a JS subexpression in SOM expressions
#13649 Merge the supplemental font data files used with XFA documents
#13691 XFA - Handle correctly nested containers with lr-tb layout (bug 1718670)
#13693 XFA - Enable disabled fields (bug 1719464)
#13694 XFA - remove unnecessary check in the handleBreak function (PR 13687 follow-up)
#13692 XFA - Correctly bind global data (bug 1718725)
#13700 XFA - Scale correctly images
#13706 XFA - Keep xfa layer on top of the others (bug 1719629)
#13703 XFA - Fix typo in factory.js
#13708 XFA - Add support for traversal and traverse element
#13710 XFA - Move xfa layer on top of the others (follow-up of #13706)
#13690 Fixed text annotation comb input box
#13696 [GENERIC viewer] Try to fixup "incomplete" language codes (issue 13689)
#13699 making webpack aware of the change inside of the worker file and hash
#13712 XFA - Always compute the transformed BBox values in checkDimensions (PR 13691 follow-up)
#13705 XFA - Fix text positions (bug 1718741)
#13715 Update packages and translations
#13714 XFA - Use fake MyriadPro as a fallback for missing fonts
#13717 XFA - Fix wrong vertical alignments
#13718 XFA - Support assist element
#13716 XFA - Avoid to have containers not pushed in the html
#13720 Revert "XFA - Avoid to have containers not pushed in the html"
#13723 XFA - Only the first page was printed (bug 1720159)
#13721 XFA - Avoid to have containers not pushed in the html

https://hg.mozilla.org/mozilla-central/rev/68fb924ed1ab

Comment on attachment 9231031 [details]
Bug 1720361 - Update pdf.js to version 2.10.316 r=#pdfjs-reviewers

Beta/Release Uplift Approval Request

• User impact if declined: Bad user experience with some pdf using XFA structure.
• Is this code covered by automated tests?: Yes
• Has the fix been verified in Nightly?: Yes
• Needs manual test from QE?: No
• If yes, steps to reproduce:
• List of other uplifts needed: None
• Risk to taking this patch: Low
• Why is the change risky/not risky? (and alternatives if risky): It's behind a pref (enableXfa) which is by default set to false.
• String changes made/needed:

Comment on attachment 9231031 [details]
Bug 1720361 - Update pdf.js to version 2.10.316 r=#pdfjs-reviewers

XFA fix, a 91 shipping feature, approved for 91 beta 4, thanks.

https://hg.mozilla.org/releases/mozilla-beta/rev/82c1ce2ea81a