Open Bug 1674155 Opened 11 months ago Updated 6 months ago

[macOS] Print preview displays wrong paper size if several steps are performed


(Core :: Printing: Setup, defect, P2)




Tracking Status
firefox83 --- affected
firefox84 --- affected


(Reporter: vlucaci, Unassigned)


(Blocks 2 open bugs)


(Keywords: regressionwindow-wanted, Whiteboard: [print2020][old-ui-] )

Affected versions

  • 84.0a1(20201029095639)
  • 83.0b5

Affected platforms

  • macOS 10.15.7
  • macOS 10.14

Steps to reproduce

  1. Launch FF.
  2. Go to and open the modal.
  3. Go to Paper size, select the 4 x 6" option and the close the modal and the tab.
  4. In a new tab , go to and open the modal.
  5. Go to Paper Size , and select A4 option then close the modal.
  6. Ctrl+Shift+T to open the page from step 1 back, then open the modal.

Expected result

  • The page should be displayed in A4 format in print preview.

Actual result

  • The print preview section becomes corrupted, displaying abnormal page sizes and content, seemingly from the previous paper size

Suggested Severity

  • Seeing as how this issue only occurs with my hardware configuration , I would S3 this issue. I suspect that this issue could appear on other printer configurations.

Regression range

  • Will return with a regression ASAP.

Additional notes

QA Whiteboard: [qa-regression-triage]

Maybe something odd in the cups back-end?

Once you reproduce, does changing the paper size again work? If it doesn't we should probably bump the priority a bit.

Severity: -- → S3
Flags: needinfo?(vlad.lucaci)

Yes, changing the paper size does indeed work and cancels out the faulty behavior.
I will also search for a regression as soon as possible.

Flags: needinfo?(vlad.lucaci)
Priority: -- → P2
Whiteboard: [print2020_v84] [old-ui-] → [print2020_v85][old-ui-]
Whiteboard: [print2020_v85][old-ui-] → [print2020_v87][old-ui-]
Whiteboard: [print2020_v87][old-ui-] → [print2020][old-ui-]
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