When you press the "print screen" key Firefox shows the full-screen message, making impossible to take screen-shots from videos without this notification

[Alberto Salvia Novella]

****************
HOW TO REPRODUCE
****************

1. In the Firefox browser, open a video played using an HTML 5 web-player (for example: http://youtu.be/wWC_WZ7gd6g)
2. Click on the full screen button.
3. Press the "print screen" key.

******************
EXPECTED BEHAVIOUR
******************

- To have taken an screen-shot of how the screen looked at that moment.

**************
REAL BEHAVIOUR
**************

- A message telling you went full screen appears in the screen-shot.

**************
TECHNICAL INFO
**************

ProblemType: Bug
DistroRelease: Ubuntu 14.04
Package: firefox 30.0+build1-0ubuntu0.14.04.3
ProcVersionSignature: Ubuntu 3.13.0-29.53-generic 3.13.11.2
Uname: Linux 3.13.0-29-generic x86_64
AddonCompatCheckDisabled: False
ApportVersion: 2.14.1-0ubuntu3.2
Architecture: amd64
AudioDevicesInUse:
 USER PID ACCESS COMMAND
 /dev/snd/controlC2: es20490446e 1959 F.... pulseaudio
 /dev/snd/controlC1: es20490446e 1959 F.... pulseaudio
 /dev/snd/controlC0: es20490446e 1959 F.... pulseaudio
BuildID: 20140608211622
Channel: Unavailable
CurrentDesktop: Unity
Date: Sun Jun 22 15:37:57 2014
Extensions: extensions.sqlite corrupt or missing
ForcedLayersAccel: False
IfupdownConfig:
 # interfaces(5) file used by ifup(8) and ifdown(8)
 auto lo
 iface lo inet loopback
IncompatibleExtensions: Unavailable (corrupt or non-existant compatibility.ini or extensions.sqlite)
InstallationDate: Installed on 2013-05-21 (397 days ago)
InstallationMedia: Ubuntu 13.04 "Raring Ringtail" - Release amd64 (20130424)
IpRoute:
 default via 192.168.2.1 dev eth0 proto static
 192.168.2.0/24 dev eth0 proto kernel scope link src 192.168.2.130 metric 1
IwConfig:
 eth0 no wireless extensions.

 lo no wireless extensions.
Locales: extensions.sqlite corrupt or missing
MostRecentCrashID: bp-a226e310-01ec-4d7b-9bf6-29cc52140606
PrefSources: prefs.js
Profiles: Profile0 (Default) - LastVersion=30.0/20140608211622 (In use)
RelatedPackageVersions:
 rhythmbox-mozilla 3.0.2-0ubuntu2
 icedtea-7-plugin 1.5-1ubuntu1
 totem-mozilla 3.10.1-1ubuntu4
RfKill:

RunningIncompatibleAddons: False
SourcePackage: firefox
SubmittedCrashIDs: bp-a226e310-01ec-4d7b-9bf6-29cc52140606
Themes: extensions.sqlite corrupt or missing
UpgradeStatus: Upgraded to trusty on 2014-04-14 (69 days ago)
dmi.bios.date: 02/18/2008
dmi.bios.vendor: Phoenix Technologies, LTD
dmi.bios.version: 6.00 PG
dmi.board.name: MS-7358
dmi.board.vendor: MICRO-STAR INTERNATIONAL CO., LTD
dmi.board.version: Fab D
dmi.chassis.type: 3
dmi.chassis.vendor: OEM
dmi.chassis.version: OEM
dmi.modalias: dmi:bvnPhoenixTechnologies,LTD:bvr6.00PG:bd02/18/2008:svnMEDIONPC:pnMS-7358:pvrOEM:rvnMICRO-STARINTERNATIONALCO.,LTD:rnMS-7358:rvrFabD:cvnOEM:ct3:cvrOEM:
dmi.product.name: MS-7358
dmi.product.version: OEM
dmi.sys.vendor: MEDIONPC

[Alberto Salvia Novella (es20490446e)]

It affects a non-essential aspect of the package.

[Alberto Salvia Novella (es20490446e)]

Created attachment 8444094
Example.png

User Agent: Mozilla/5.0 (X11; Ubuntu; Linux x86_64; rv:30.0) Gecko/20100101 Firefox/30.0 (Beta/Release)
Build ID: 20140608211622

Steps to reproduce:

1. In the Firefox browser, open a video played using an HTML 5 web-player (for example: http://youtu.be/wWC_WZ7gd6g)
2. Click on the full screen button.
3. Press the "print screen" key.

Actual results:

A message telling you went full screen appears in the screen-shot.

Expected results:

To have taken an screen-shot of how the screen looked at that moment.

[Xtc4uall (xtc4uall)]

Do you see this on other sites using html5 as well, e.g. http://vimeo.com/93897087 ?

[Gunnar Hjalmarsson (gunnarhj)]

Can't reproduce. For me it works as expected.

[Alberto Salvia Novella (es20490446e)]

Yes, I see this bug in every site that shows this full-screen message.

[Alberto Salvia Novella (es20490446e)]

@ Gunnar Hjalmarsson:

Can you provide information about which of these where you using when testing:

- Ubuntu release.
- Desktop environment.
- Firefox version.
- Graphic processor.

[Gunnar Hjalmarsson (gunnarhj)]

Sure. Ubuntu 14.04 with Unity, Firefox 30.0, and Nvidia 331.38.

[Alberto Salvia Novella (es20490446e)]

The only apparent difference is the graphics driver:
xserver-xorg-video-ati 1:7.3.0-1ubuntu3.1

[Alberto Salvia Novella (es20490446e)]

I cannot reproduce it in a laptop using Intel graphics.

[Alberto Salvia Novella (es20490446e)]

False, it is reproducible too under Intel graphics; just by enabling HTML 5 player in <https://www.youtube.com/html5>.

@ Gunnar Hjalmarsson:

Does it happen the same to you after doing the same?

[Gunnar Hjalmarsson (gunnarhj)]

Ah, yes, after having enabled the HTML5 player via that page, I could reproduce the behaviour.

[Andrea Azzarone (azzar1)]

Not a unity/lightdm bug. Marking as invalid. Please re-open if it does not happen in other shells.