1427380 - Keyboard shortcut for printing is throwing a warning message

Status: NEW

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

Description

[Stefan [:StefanG_QA]]

Mozilla/5.0 (Windows NT 10.0; rv:59.0) Gecko/20100101 Firefox/59.0 (20171229100308)

Make sure to add the following pref: print.print_via_pdf_encoder : skia-pdf

1. Open this *.html sample file. (https://drive.google.com/file/d/0BzOV3ybvBASXR3RXaGRQczRSYnM/view )
2. Press Ctrl + P
3. Print preview the page
4. Print it.
5. Compare the page with the actual document

AR: error is shown when using short cut ctrl+p to print preview the page 
Video Showing the issue: https://St3fQA.tinytake.com/sf/MjE5NzIxNV82ODE3MTQ4

ER: No Warning message

Comment 1

[Astley Chen (inactive)]

I can reproduce this symptom on ALL platforms with ALL Firefox builds. This is not a regression caused by our feature.
Stefan, could you confirm?

Comment 2

[Stefan [:StefanG_QA]]

I can confirm I can reproduce this on different Firefox builds. I've used mozregression in order to narrow down the issue. Here are my findings: 

Last good revision: 201b30adaf89493e1fdd200a4ce9172bb905a33d
First bad revision: 1f83a9089442610aee9e2865cd6bc508bda35f11
Pushlog: https://hg.mozilla.org/integration/mozilla-inbound/pushloghtml?fromchange=201b30adaf89493e1fdd200a4ce9172bb905a33d&tochange=1f83a9089442610aee9e2865cd6bc508bda35f11

Comment 3

[Mantaroh Yoshinaga[:mantaroh]]

I looked into this a little bit.

Google Drive hook the keyboard event (If the user pushes the ctrl + p, Google Drive will open this document as PDF), then a script will call the window.print(). Gecko will try to print this PDF as well due to ctrl + p. However, this document doesn't load yet. So gecko will display the alert dialog.

In any case, this is no longer block to the bug 1399787.