Found in

• Firefox 108.0b6

Affected versions

• Firefox 108.0b6
• Firefox 109.0a1

Tested platforms

• Affected platforms: macOS 11.7.1, Windows 10 & 7, Ubuntu 22.04

Steps to reproduce

1. Launch Firefox
2. Access an editable pdf with checkboxes, for example
3. See the options from Gender or from the "Reliable Transport" part

Expected result

• The radio buttons are not drawn over the checkboxes

Actual result

• Radio buttons are drawn over the checkboxes

Regression range

• Not a regression, only a bit different rendering behavior on older builds (85.0a1 - 2020). By going to even older builds (72.0a1 - 2019) this message appears "This PDF document contains forms. The filling of form fields is not supported".

Additional notes

• The issue can be seen in the following attachment
• Print preview/print to file will render the pdf correctly
• In an 85.0a1, 2020-11-22 build the checkboxes are more visible and only by hovering over them the circle will appear (see image in attachment)
• Not all selectable options are affected, for example those in "Position(s) Desired" are not affected

(In reply to Catalin Sasca, Desktop QA [:csasca] from comment #0)

2. Access an editable pdf with checkboxes, for example

Clarifying the STR -- this bug specifically reproduces on editable PDFs with checkboxes that are meant to be mutually exclusive (which semantically behave like radio buttons, but are encoded to be drawn as checkbox "x" marks)

We seem to represent those with actual radio buttons, in editable mode.

If needed, we've got another testcase that reproduces this, saved as an attachment on the duped bug: attachment 9362986 [details]

Page 2 of that PDF has some editable checkboxes that Firefox renders as radio buttons (when viewing/editing the form), as shown in the screencast on the duped bug.