Following comment #20 nothing really changed for me on Xenial, the only difference is with the second part the window takes again a longer time to be destroyed.


$ webbrowser-app --desktop_file_hint=/usr/share/applications/webbrowser-app.desktop

Output:
(webbrowser-app:20815): dconf-CRITICAL **: unable to create file '/run/user/1000/dconf/user': Permission denied.  dconf will not work properly.

(webbrowser-app:20815): dconf-CRITICAL **: unable to create file '/run/user/1000/dconf/user': Permission denied.  dconf will not work properly.

(webbrowser-app:20815): dconf-CRITICAL **: unable to create file '/run/user/1000/dconf/user': Permission denied.  dconf will not work properly.
unity::action::ActionManager::ActionManager(QObject*):
	Could not determine application identifier. HUD will not work properly.
	Provide your application identifier in $APP_ID environment variable.
UCUriHandler: Empty "APP_ID" environment variable, ignoring.
file:///usr/share/webbrowser-app/webbrowser/ContentPickerDialog.qml:22:1: module "Ubuntu.Content" is not installed
file:///usr/share/webbrowser-app/webbrowser/ContentDownloadDialog.qml:22:1: module "Ubuntu.Content" is not installed
file:///usr/share/webbrowser-app/ContentHandler.qml:20:1: module "Ubuntu.Content" is not installed
file:///usr/share/webbrowser-app/webbrowser/DownloadHandler.qml:20:1: module "Ubuntu.DownloadManager" is not installed

(webbrowser-app:20815): IBUS-WARNING **: Unable to connect to ibus: Could not connect: Permission denied
Failed to create OpenGL context for format QSurfaceFormat(version 2.0, options QFlags(), depthBufferSize 24, redBufferSize -1, greenBufferSize -1, blueBufferSize -1, alphaBufferSize -1, stencilBufferSize 8, samples -1, swapBehavior 2, swapInterval 1, profile  0) 
Aborted (core dumped) 

-----------------------------

Adding "/sys/devices/pci[0-9]*/**/config r," to webbrowser apparmor profile.

Output:

unity::action::ActionManager::ActionManager(QObject*):
	Could not determine application identifier. HUD will not work properly.
	Provide your application identifier in $APP_ID environment variable.
UCUriHandler: Empty "APP_ID" environment variable, ignoring.
file:///usr/share/webbrowser-app/webbrowser/ContentPickerDialog.qml:22:1: module "Ubuntu.Content" is not installed
file:///usr/share/webbrowser-app/webbrowser/ContentDownloadDialog.qml:22:1: module "Ubuntu.Content" is not installed
file:///usr/share/webbrowser-app/ContentHandler.qml:20:1: module "Ubuntu.Content" is not installed
file:///usr/share/webbrowser-app/webbrowser/DownloadHandler.qml:20:1: module "Ubuntu.DownloadManager" is not installed
(webbrowser-app:20702): IBUS-WARNING **: Unable to connect to ibus: Could not connect: Permission denied
[0214/235344.331855:ERROR:oxide_qt_gl_context_dependent.cc(82)] Unable to create adopted GL context for platform: xcb - unexpected result from QPlatformNativeInterface::nativeResourceForContext
shm_open() failed: Permission denied


[0214/235346.452672:ERROR:gl_context_glx.cc(196)] Failed to create GL context with glXCreateContextAttribsARB.
[0214/235346.452702:ERROR:gpu_info_collector.cc(50)] gl::init::CreateGLContext failed
[0214/235346.452711:ERROR:gpu_info_collector.cc(118)] Could not create context for info collection.
[0214/235346.452733:ERROR:oxide_browser_main_parts.cc(326)] gpu::CollectContextGraphicsInfo failed
[0214/235346.536227:ERROR:gl_context_glx.cc(196)] Failed to create GL context with glXCreateContextAttribsARB.
[0214/235346.536255:ERROR:gpu_info_collector.cc(50)] gl::init::CreateGLContext failed
[0214/235346.536263:ERROR:gpu_info_collector.cc(118)] Could not create context for info collection.
qml: Loaded 8 UA override(s) from file:///usr/lib/x86_64-linux-gnu/qt5/qml/Ubuntu/Web/ua-overrides-mobile.js

OxideQQuickWebView: canGoForward is deprecated. Please use the API provided by OxideQQuickNavigationHistory instead
OxideQQuickWebView: canGoBack is deprecated. Please use the API provided by OxideQQuickNavigationHistory instead
TouchSelectionController::active is deprecated, use TouchSelectionController::status instead
file:///usr/share/webbrowser-app/Downloader.qml:22:1: module "Ubuntu.DownloadManager" is not installed
file:///usr/share/webbrowser-app/Downloader.qml:23:1: module "Ubuntu.Content" is not installed
file:///usr/share/webbrowser-app/Downloader.qml:22:1: module "Ubuntu.DownloadManager" is not installed
file:///usr/share/webbrowser-app/Downloader.qml:23:1: module "Ubuntu.Content" is not installed
Failed to create OpenGL context for format QSurfaceFormat(version 2.0, options QFlags(), depthBufferSize 24, redBufferSize -1, greenBufferSize -1, blueBufferSize -1, alphaBufferSize -1, stencilBufferSize 8, samples -1, swapBehavior 2, swapInterval 1, profile  0) 
Aborted (core dumped)



***removed 17 repeats of:
(webbrowser-app:20702): dconf-CRITICAL **: unable to create file '/run/user/1000/dconf/user': Permission denied.  dconf will not work properly.