1648903 - Printing A4 pages with abspos precisely-measured abspos content is faulty

Status: NEW

(Core :: Printing: Output, defect, P3)

Description

[xxalfa]

Attachment: print-test.html

User Agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:77.0) Gecko/20100101 Firefox/77.0

Steps to reproduce:

Step 1: Setting the unit via about:config -> print.printer_Microsoft_Print_To_PDF.print_paper_size_unit -> 0 to 1 (0 means imperial and 1 means metric)
Step 2: File -> Print setup -> Format portrait and 100%
Step 3: File -> Print setup -> Print background = yes
Step 4: File -> Print setup -> Margins headers and footers = all 0
Step 5: Open the file print-test.html with Mozilla Firefox and Microsoft Edge
Step 6: File -> Print preview
Step 7: See the difference between the two screenshots.

Actual results:

See screenshot: Mozilla.Firefox.Print.Preview.png

The page content overlaps. Which creates new blank pages. Only the blue bar can be seen on pages three and four.

Expected results:

See screenshot: Microsoft.Edge.Print.Preview.png

All four pages should contain the full three bars. In the format of a standard A4 letter.

Comment 1

[BugBot [:suhaib / :marco/ :calixte]]

Bugbug thinks this bug should belong to this component, but please revert this change in case of error.

Comment 2

[Daniel Holbert [:dholbert]]

Thanks for the bug report!

This may be due to bug 1468369, to a certain extent. (That bug is about missing abspos content after a forced break - and note that the colorful divs here are abspos elements, and each "page container" div has a forced break from page-break-after:always.)