1379468 - When new tab from window.open is moved it will become empty

Status: RESOLVED DUPLICATE of bug 1374025

(Firefox :: Tabbed Browser, defect)

Description

[zdnex]

User Agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:54.0) Gecko/20100101 Firefox/54.0
Build ID: 20170628075643

Steps to reproduce:

1) open https://www.mozilla.org/en-US/contact/ and open another window in current Firefox Developer
2) open console on loaded page and allow opening of popups
3) open new popup tab with js
 win = window.open("https://www.mozilla.org/en-US/contact/","new_page");
4) check loaded page location > win.location.href is equal to loaded page
5) drag and drop tab to different Firefox window (same version) - here it breaks
6) check win.location.href - should match


Actual results:

When tab is moved to another window is suddenly empty/blank and data are mostly gone. This happens on FF55b7 - current firefox developer version on win and linux. I am quite sure it was working in some version before.


Expected results:

It should normally allow tab to be moved around and win variable should be still accessible. It works in 54 and 52 normally.

Comment 1

[zdnex]

Attachment: empty_window_open_after_move.png

on left is opened tab with start page and console with opening new tab>which is then moved to right and it becomes empty in FF55b7

Comment 2

[zdnex]

Hello, I have tried to do bisection - and I have found where the problem happened. I am not sure what to do now?

2017-07-10T09:21:10: DEBUG : Starting merge handling...
2017-07-10T09:21:10: DEBUG : Using url: https://hg.mozilla.org/integration/mozilla-inbound/json-pushes?changeset=63a1460c38043c88d9ff4556eed904aebeb333ce&full=1
2017-07-10T09:21:10: DEBUG : Found commit message:
Bug 1353060: Allow APZ in popup window widgets. r=kats

Prior to this patchset, we never hosted remote, scrollable content in widgets
other than toplevel and child windows, so all other widget types have APZ
disabled. Since we now need to host remote content in popup widgets, and would
like similar performance and behavior for those browsers as other remote
browsers, we also need to enable APZ for those widgets too.

MozReview-Commit-ID: AVDt9U5i2WK

2017-07-10T09:21:10: INFO : The bisection is done.
2017-07-10T09:21:10: INFO : Stopped

Attaching screenshot of bisect.

Comment 3

[zdnex]

Attachment: bissection process ff

Comment 4

[:Gijs (he/him)]

Yep, we're working on this issue.