Application startup fail, the whole GUI is freezing during startup

[Bátonyi Péter]

DESCRIPTION:
When I trying to start this application, the whole GUI is just freezing for minutes.
After that application just stops with an error message or application started up, but the window could not loaded correctly, the window just full with squares.

Environment details:______________________

Ubuntu version: Ubuntu 16.04 LTS (4.15.0-42-generic #45~16.04.1-Ubuntu)
CPU Architecture: 64bit
CPU: Intel® Core™ i5-7200U CPU @ 2.50GHz × 4
Graphic card: Intel® HD Graphics 620 (Kaby Lake GT2)

CLI Output:______________________

(webbrowser-app:11283): dconf-CRITICAL **: unable to create file '/run/user/1000/dconf/user': Engedély megtagadva. dconf will not work properly.

(webbrowser-app:11283): dconf-CRITICAL **: unable to create file '/run/user/1000/dconf/user': Engedély megtagadva. dconf will not work properly.

(webbrowser-app:11283): dconf-CRITICAL **: unable to create file '/run/user/1000/dconf/user': Engedély megtagadva. dconf will not work properly.
libGL error: MESA-LOADER: failed to retrieve device information
libGL error: Version 4 or later of flush extension not found
libGL error: failed to load driver: i915
libGL error: MESA-LOADER: failed to retrieve device information
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:11283): IBUS-WARNING **: Unable to connect to ibus: Nem sikerült kapcsolódni: Engedély megtagadva
libGL error: MESA-LOADER: failed to retrieve device information
libGL error: Version 4 or later of flush extension not found
libGL error: failed to load driver: i915
libGL error: MESA-LOADER: failed to retrieve device information
shm_open() failed: Engedély megtagadva

(webbrowser-app:11283): dconf-CRITICAL **: unable to create file '/run/user/1000/dconf/user': Engedély megtagadva. dconf will not work properly.

(webbrowser-app:11283): dconf-CRITICAL **: unable to create file '/run/user/1000/dconf/user': Engedély megtagadva. dconf will not work properly.

(webbrowser-app:11283): dconf-CRITICAL **: unable to create file '/run/user/1000/dconf/user': Engedély megtagadva. dconf will not work properly.

(webbrowser-app:11283): dconf-CRITICAL **: unable to create file '/run/user/1000/dconf/user': Engedély megtagadva. dconf will not work properly.

(webbrowser-app:11283): dconf-CRITICAL **: unable to create file '/run/user/1000/dconf/user': Engedély megtagadva. dconf will not work properly.

(webbrowser-app:11283): dconf-CRITICAL **: unable to create file '/run/user/1000/dconf/user': Engedély megtagadva. dconf will not work properly.

(webbrowser-app:11283): dconf-CRITICAL **: unable to create file '/run/user/1000/dconf/user': Engedély megtagadva. dconf will not work properly.

(webbrowser-app:11283): dconf-CRITICAL **: unable to create file '/run/user/1000/dconf/user': Engedély megtagadva. dconf will not work properly.

(webbrowser-app:11283): dconf-CRITICAL **: unable to create file '/run/user/1000/dconf/user': Engedély megtagadva. dconf will not work properly.

(webbrowser-app:11283): dconf-CRITICAL **: unable to create file '/run/user/1000/dconf/user': Engedély megtagadva. dconf will not work properly.

(webbrowser-app:11283): dconf-CRITICAL **: unable to create file '/run/user/1000/dconf/user': Engedély megtagadva. dconf will not work properly.

(webbrowser-app:11283): dconf-CRITICAL **: unable to create file '/run/user/1000/dconf/user': Engedély megtagadva. dconf will not work properly.

(webbrowser-app:11283): dconf-CRITICAL **: unable to create file '/run/user/1000/dconf/user': Engedély megtagadva. dconf will not work properly.
[1219/100111.415397:ERROR:child_thread_impl.cc(762)] Request for unknown Channel-associated interface: ui::mojom::GpuMain
TouchSelectionController::active is deprecated, use TouchSelectionController::status instead
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
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
file:///usr/share/webbrowser-app/Downloader.qml:22:1: module "Ubuntu.DownloadManager" is not installed
Input device added: "Power Button" "/dev/input/event3" QFlags(0x1)
Input device added: "Video Bus" "/dev/input/event5" QFlags(0x1)
Input device added: "Power Button" "/dev/input/event2" QFlags(0x1)
Input device added: "Lid Switch" "/dev/input/event1" QFlags(0x20)
Input device added: "Sleep Button" "/dev/input/event0" QFlags(0x1)
Input device added: "Logitech USB Optical Mouse" "/dev/input/event7" QFlags(0x2)
Input device added: "SINO WEALTH USB KEYBOARD" "/dev/input/event8" QFlags(0x1|0x10)
Input device added: "SINO WEALTH USB KEYBOARD" "/dev/input/event9" QFlags(0x1)
Input device added: "HDA Intel PCH Mic" "/dev/input/event10" QFlags(0x20)
Input device added: "HDA Intel PCH Headphone" "/dev/input/event11" QFlags(0x20)
Input device added: "HDA Intel PCH HDMI/DP,pcm=3" "/dev/input/event12" QFlags(0x20)
Input device added: "HDA Intel PCH HDMI/DP,pcm=7" "/dev/input/event13" QFlags(0x20)
Input device added: "HDA Intel PCH HDMI/DP,pcm=8" "/dev/input/event14" QFlags(0x20)
Input device added: "HDA Intel PCH HDMI/DP,pcm=9" "/dev/input/event15" QFlags(0x20)
Input device added: "HDA Intel PCH HDMI/DP,pcm=10" "/dev/input/event16" QFlags(0x20)
Input device added: "AT Translated Set 2 keyboard" "/dev/input/event4" QFlags(0x1|0x10)
Input device added: "ETPS/2 Elantech Touchpad" "/dev/input/event6" QFlags(0x4|0x8)
QOpenGLShader: could not create shader

(webbrowser-app:11283): dconf-CRITICAL **: unable to create file '/run/user/1000/dconf/user': Engedély megtagadva. dconf will not work properly.
QOpenGLShader: could not create shader
QOpenGLShader: could not create shader
QOpenGLShader: could not create shader
QOpenGLShader: could not create shader
QOpenGLShader: could not create shader
intel_do_flush_locked failed: Kimeneti/bemeneti hiba
[1219/100223.084164:FATAL:oxide_browser_process_main.cc(472)] Check failed: state_ == STATE_NOT_STARTED || state_ == STATE_SHUTDOWN. BrowserProcessMain::Shutdown() should be called before process exit
#0 0x7f45835dc63e <unknown>
#1 0x7f45835f637e <unknown>
#2 0x7f4584c17579 <unknown>
#3 0x7f45c22eeff8 <unknown>
#4 0x7f45c22ef045 exit
#5 0x7f459f7f8f8e <unknown>
#6 0x7f459f7fecec <unknown>
#7 0x7f459f7feec5 <unknown>
#8 0x7f459f80468b <unknown>
#9 0x7f459f5ae5ac <unknown>
#10 0x7f459f5ae810 <unknown>
#11 0x7f459f804e2c <unknown>
#12 0x7f459f59d263 <unknown>
#13 0x7f459f59ed20 <unknown>
#14 0x7f45c42d5fe3 QSGPlainTexture::bind()
#15 0x7f45c440fd2a <unknown>
#16 0x7f45c42bbb9f QSGBatchRenderer::Renderer::renderMergedBatch()
#17 0x7f45c42bc675 QSGBatchRenderer::Renderer::renderBatches()
#18 0x7f45c42c1e82 QSGBatchRenderer::Renderer::render()
#19 0x7f45c42cdb6f QSGRenderer::renderScene()
#20 0x7f45c42ce3bb QSGRenderer::renderScene()
#21 0x7f45c42de87e QSGRenderContext::renderNextFrame()
#22 0x7f45c43290db QQuickWindowPrivate::renderSceneGraph()
#23 0x7f45c42f919b <unknown>
#24 0x7f45c42faaa6 <unknown>
#25 0x7f45c391a2b5 QWindow::event()
#26 0x7f45c4334871 QQuickWindow::event()
#27 0x7f45c46be05c QApplicationPrivate::notify_helper()
#28 0x7f45c46c3516 QApplication::notify()
#29 0x7f45c31a638b QCoreApplication::notifyInternal()
#30 0x7f45c39124ac QGuiApplicationPrivate::processExposeEvent()
#31 0x7f45c391321d QGuiApplicationPrivate::processWindowSystemEvent()
#32 0x7f45c38f6f08 QWindowSystemInterface::sendWindowSystemEvents()
#33 0x7f45bb066200 <unknown>
#34 0x7f45c1b7e197 g_main_context_dispatch
#35 0x7f45c1b7e3f0 <unknown>
#36 0x7f45c1b7e49c g_main_context_iteration
#37 0x7f45c31fc7cf QEventDispatcherGlib::processEvents()
#38 0x7f45c31a3b4a QEventLoop::exec()
#39 0x7f45c31abbec QCoreApplication::exec()
#40 0x55db2abd3e16 (/usr/bin/webbrowser-app+0x55db2abd3e15)
#41 0x55db2abc8a05 (/usr/bin/webbrowser-app+0x55db2abc8a04)
#42 0x7f45c22d5830 __libc_start_main
#43 0x55db2abc8b69 (/usr/bin/webbrowser-app+0x55db2abc8b68)

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