Closed Bug 790013 Opened 11 years ago Closed 2 years ago

New window opens behind, due to a bug in Flash Player


(Core Graveyard :: Plug-ins, defect, P3)

15 Branch
Windows 7


(Not tracked)



(Reporter: iccor56, Unassigned)



User Agent: Mozilla/5.0 (Windows NT 6.1; rv:15.0) Gecko/20100101 Firefox/15.0
Build ID: 20120824154833

Steps to reproduce:

with tabs off open in a new window open a new window behind current window. even stranger it happens for links when i first open the program but if i close the window and follow the link again it opens in front like it should. This started with version 15. problem persists in safe mode. windows opened with right click menu operate normally.

Actual results:

new window opens behind current window

Expected results:

new window opens in front of current window
What do you mean by "with tabs off"?

Can you give an example of a page and link where this happens?  Are you just left-clicking the link?

I tried unchecking "Open new windows in a new tab instead" and "always show the tab bar", and I tried clicking target=_blank links and buttons, and wasn't able to reproduce the bug.  (Firefox Nightly 18 on Mac OS X 10.7)
i might also be website specific, it happens sometimes everywhere but it happens especially with and even if i open a new window and then type in the address
I don't want them to open in a tab. i use tabs for some things windows in others. i have "open new windows in new tabs" specifically turned off. i use tabs from the right click menu and ctrl click. everything else i let go to a new window.
in safe mode i went to google searched something and opened the first link ( have search options set to open them in a new window). and it loaded behind the google window.
i have also ( in unsafe mode) copied ''. ctrl-n paste, went behind the window. ctrl-n paste. stayed in front. it seems everywhere to do it the first time but not after that.
Does it work if you disable the flash plugin in addon manager/plugins ?
it still does it when i reboot into safe mode as per the help menu option 'restart with add-ons disabled' does this disable that plugin as well?
>does this disable that plugin as well?
no, the safemode disables all extensions, the graphic hardware acceleration, the Javascript jit and default window/toolbar settings are loaded but the plugins are still enabled !

on win7: Press the alt key for the menu, open tools/addons/plugins , search the flash plugin and click on disable.
does the flash plugin need to be updated or something? it appears to correct when it is disabled
this is a bug in the flash player.
A workaround is to disable the protected mode (scroll down to "last resort")

This is nearly like bug 768802 except that the focus is not entirely lost but instead another Firefox/Seamonkey gets the focus.
I can reproduce the issue with Flash 11.4.402.265 and Mozilla/5.0 (Windows NT 6.1; rv:18.0) Gecko/18.0 Firefox/18.0 SeaMonkey/2.15a1
This only happens when the plugin-container with flash starts.
Component: Untriaged → Plug-ins
Ever confirmed: true
Product: Firefox → Core
Damn i really wish someone fix this it's driving me crazy
Summary: new window opens behind → New window opens behind, due to a bug in Flash Player
Priority: -- → P3
More to add---

Windows 7 64 bit FF13

100% of time with fresh FireFox window
follow link >>>   Review: 2013 Subaru XV Crosstrek 
youtube window opens behind...

Subsequently following the same link is in front...

Unrelated ??: Using cutePDF writer on same machine pop-up will not show until you esc / mouse click / alt ...

Could this be a WIN 7 WOW 32bit problem !!

I have not tried this on WIN 7 32bit machine
Bug must be fixed in FF18 beta get it at filehippo
Work around: I have the problem "New window opens behind, due to a bug in Flash Player".  It has been very troublesome for me and also when my partner uses the pc.  I am an experienced computer user whereas partner is not and she gets very confused by this whereas I just find it very intensely annoying.
Operating system Windows 7 64 bit, Firefox 18.0.1   It's easy to reproduce every time. Open Firefox window on my home page, ( Right click on Youtube in the bookmarks toolbar, Select 'Open in new window'.  When the Youtube window opens there is a slight pause, then the 'New Window' disappears behind the original.  Same happens if I right click the Youtube link in the Google search home page. Same problem too with *any* site that uses Flash if 'Open in new Window' is selected.  Needless to say I use 'Open in new window' a lot.
How I worked aground it:  Instead of having just as my home page, I also selected Youtube to open when the browser is opened.  Because the Flash plugin is already active at browser startup, I can open any site that uses flash 'In a new window' and the problem doesn't happen.  For me, problem solved until a cure is found for the Flash/Firefox bug.  Not an ideal solution but it works as long as you leave the Youtube page alone.
Depends on: 768802
See Also: → 768802
According to and at least 263 experienced this problem.

I also experienced this on Windows Vista several months ago before having the surprise to realize that a fresh Windows 8 install now on Firefox 20 also has the same problem. I have Flash 11,6,602,180
This bug is remarkable for the per-window private browsing(implemented by Bug 818732).

Step To Reproduce:
1. Start Firefox in normal mode
2. Open
3. Right click on a link and choose "Open Link in New Private Window".

Actual Results:
  The new private window becomes behind other window. 

Expected Result:
  Window z-order should persist
This must be related to

I'm experiencing the same annoying behavior.

Windows 7
Firefox 20.0.1
Well I too have been driven crazy by this bug...

Here is what I did and it seems to work.... but maybe the engineers could shed some light on the impact of the change...

Go into about:config


Mine was set to -1 by default, I took a guess and changed it to 1, and whala it worked....

Hope it works from here on out, just want to punch the screen when it happens, so frustrating!
Changing: to 1 did not work for me but I wasn't "careful" as I promised and changed:; from 3 to 2 and that worked.
(In reply to Bruce from comment #19)
> Changing: to 1 did not work
> for me but I wasn't "careful" as I promised and changed:
>; from 3 to 2 and that worked.

Scratch that.  Only worked once for some reason.
They still have not fixed this since like 15. Now I'm starting to see a massive slow down with FF
I just got rid of this bug because I switched to the Pale Moon browser. It's based on Firefox source code and behaves just like it, but it doesn't have this bug. And it doesn't have the new UI design.
Resolving as wont fix, plugin support deprecated in Firefox 85.
Closed: 2 years ago
Resolution: --- → WONTFIX
Product: Core → Core Graveyard
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