Unable to run Tor-Browser 12 for Linux after updating

After upgrading Tor-Browser to version 12 it fails to start due to an error.
Initially I thought that some problem in the update would have caused the error.
I downloaded tor-browser-linux64-12.0_ALL.tar.xz and extracted the program on top of the installation: The error continued.
I uninstalled the program and completely deleted the directory before reinstalling it, but it is still on error.
Finally I downloaded the tor-browser-linux64-12.0a5_ALL.tar.xz version in case it was a fixed problem but it still errored.

Any help?
Alternatively, where can I download version 11 that worked correctly?

Machine:
Operating System: Linux Ubuntu 16.04.7 LTS x86_64 xenial
Kernel: 4.15.0-200-generic
Shell: bash
Desktop: gnome-flashback-metacity
Processor: Intel(R) Core™ i7-9700 CPU @ 3.00GHz
Memory: 32GB In use: 19%

Log:
[Parent 31323, Main Thread] WARNING: gtk_widget_get_style_context: assertion ‘GTK_IS_WIDGET (widget)’ failed: ‘glib warning’, file /var/tmp/build/firefox-c7aeef1139f0/toolkit/xre/nsSigHandlers.cpp:167

(Tor Browser:31323): Gtk-CRITICAL **: gtk_widget_get_style_context: assertion ‘GTK_IS_WIDGET (widget)’ failed
[Parent 31323, Main Thread] WARNING: gtk_style_context_get_state: assertion ‘GTK_IS_STYLE_CONTEXT (context)’ failed: ‘glib warning’, file /var/tmp/build/firefox-c7aeef1139f0/toolkit/xre/nsSigHandlers.cpp:167

(Tor Browser:31323): Gtk-CRITICAL **: gtk_style_context_get_state: assertion ‘GTK_IS_STYLE_CONTEXT (context)’ failed
[Parent 31323, Main Thread] WARNING: gtk_style_context_get_property: assertion ‘GTK_IS_STYLE_CONTEXT (context)’ failed: ‘glib warning’, file /var/tmp/build/firefox-c7aeef1139f0/toolkit/xre/nsSigHandlers.cpp:167

(Tor Browser:31323): Gtk-CRITICAL **: gtk_style_context_get_property: assertion ‘GTK_IS_STYLE_CONTEXT (context)’ failed
[Parent 31323, Main Thread] WARNING: gtk_style_context_get_property: assertion ‘GTK_IS_STYLE_CONTEXT (context)’ failed: ‘glib warning’, file /var/tmp/build/firefox-c7aeef1139f0/toolkit/xre/nsSigHandlers.cpp:167

(Tor Browser:31323): Gtk-CRITICAL **: gtk_style_context_get_property: assertion ‘GTK_IS_STYLE_CONTEXT (context)’ failed
[Parent 31323, Main Thread] WARNING: gtk_style_context_get_property: assertion ‘GTK_IS_STYLE_CONTEXT (context)’ failed: ‘glib warning’, file /var/tmp/build/firefox-c7aeef1139f0/toolkit/xre/nsSigHandlers.cpp:167

(Tor Browser:31323): Gtk-CRITICAL **: gtk_style_context_get_property: assertion ‘GTK_IS_STYLE_CONTEXT (context)’ failed
[Parent 31323, Main Thread] WARNING: gtk_style_context_get_property: assertion ‘GTK_IS_STYLE_CONTEXT (context)’ failed: ‘glib warning’, file /var/tmp/build/firefox-c7aeef1139f0/toolkit/xre/nsSigHandlers.cpp:167

(Tor Browser:31323): Gtk-CRITICAL **: gtk_style_context_get_property: assertion ‘GTK_IS_STYLE_CONTEXT (context)’ failed
[Parent 31323, Main Thread] WARNING: gtk_style_context_get_property: assertion ‘GTK_IS_STYLE_CONTEXT (context)’ failed: ‘glib warning’, file /var/tmp/build/firefox-c7aeef1139f0/toolkit/xre/nsSigHandlers.cpp:167

(Tor Browser:31323): Gtk-CRITICAL **: gtk_style_context_get_property: assertion ‘GTK_IS_STYLE_CONTEXT (context)’ failed
[Parent 31323, Main Thread] WARNING: gtk_widget_get_style_context: assertion ‘GTK_IS_WIDGET (widget)’ failed: ‘glib warning’, file /var/tmp/build/firefox-c7aeef1139f0/toolkit/xre/nsSigHandlers.cpp:167

(Tor Browser:31323): Gtk-CRITICAL **: gtk_widget_get_style_context: assertion ‘GTK_IS_WIDGET (widget)’ failed
[Parent 31323, Main Thread] WARNING: gtk_style_context_get_state: assertion ‘GTK_IS_STYLE_CONTEXT (context)’ failed: ‘glib warning’, file /var/tmp/build/firefox-c7aeef1139f0/toolkit/xre/nsSigHandlers.cpp:167

(Tor Browser:31323): Gtk-CRITICAL **: gtk_style_context_get_state: assertion ‘GTK_IS_STYLE_CONTEXT (context)’ failed
[Parent 31323, Main Thread] WARNING: gtk_style_context_get_property: assertion ‘GTK_IS_STYLE_CONTEXT (context)’ failed: ‘glib warning’, file /var/tmp/build/firefox-c7aeef1139f0/toolkit/xre/nsSigHandlers.cpp:167

(Tor Browser:31323): Gtk-CRITICAL **: gtk_style_context_get_property: assertion ‘GTK_IS_STYLE_CONTEXT (context)’ failed
Fontconfig warning: “/home/gonzalo/tor-browser/Browser/TorBrowser/Data/fontconfig/fonts.conf”, line 178: blank doesn’t take any effect anymore. please remove it from your fonts.conf
[Parent 31323, Main Thread] WARNING: gtk_widget_get_style_context: assertion ‘GTK_IS_WIDGET (widget)’ failed: ‘glib warning’, file /var/tmp/build/firefox-c7aeef1139f0/toolkit/xre/nsSigHandlers.cpp:167

(Tor Browser:31323): Gtk-CRITICAL **: gtk_widget_get_style_context: assertion ‘GTK_IS_WIDGET (widget)’ failed
[Parent 31323, Main Thread] WARNING: gtk_style_context_get_state: assertion ‘GTK_IS_STYLE_CONTEXT (context)’ failed: ‘glib warning’, file /var/tmp/build/firefox-c7aeef1139f0/toolkit/xre/nsSigHandlers.cpp:167

(Tor Browser:31323): Gtk-CRITICAL **: gtk_style_context_get_state: assertion ‘GTK_IS_STYLE_CONTEXT (context)’ failed
[Parent 31323, Main Thread] WARNING: gtk_style_context_get_background_color: assertion ‘GTK_IS_STYLE_CONTEXT (context)’ failed: ‘glib warning’, file /var/tmp/build/firefox-c7aeef1139f0/toolkit/xre/nsSigHandlers.cpp:167

(Tor Browser:31323): Gtk-CRITICAL **: gtk_style_context_get_background_color: assertion ‘GTK_IS_STYLE_CONTEXT (context)’ failed
[Parent 31323, Main Thread] WARNING: gtk_style_context_get_color: assertion ‘GTK_IS_STYLE_CONTEXT (context)’ failed: ‘glib warning’, file /var/tmp/build/firefox-c7aeef1139f0/toolkit/xre/nsSigHandlers.cpp:167

(Tor Browser:31323): Gtk-CRITICAL **: gtk_style_context_get_color: assertion ‘GTK_IS_STYLE_CONTEXT (context)’ failed
[Parent 31323, Main Thread] WARNING: gtk_widget_get_style_context: assertion ‘GTK_IS_WIDGET (widget)’ failed: ‘glib warning’, file /var/tmp/build/firefox-c7aeef1139f0/toolkit/xre/nsSigHandlers.cpp:167

(Tor Browser:31323): Gtk-CRITICAL **: gtk_widget_get_style_context: assertion ‘GTK_IS_WIDGET (widget)’ failed
[Parent 31323, Main Thread] WARNING: gtk_style_context_get_state: assertion ‘GTK_IS_STYLE_CONTEXT (context)’ failed: ‘glib warning’, file /var/tmp/build/firefox-c7aeef1139f0/toolkit/xre/nsSigHandlers.cpp:167

(Tor Browser:31323): Gtk-CRITICAL **: gtk_style_context_get_state: assertion ‘GTK_IS_STYLE_CONTEXT (context)’ failed
[Parent 31323, Main Thread] WARNING: gtk_style_context_get_property: assertion ‘GTK_IS_STYLE_CONTEXT (context)’ failed: ‘glib warning’, file /var/tmp/build/firefox-c7aeef1139f0/toolkit/xre/nsSigHandlers.cpp:167

(Tor Browser:31323): Gtk-CRITICAL **: gtk_style_context_get_property: assertion ‘GTK_IS_STYLE_CONTEXT (context)’ failed
[Parent 31323, Main Thread] WARNING: gtk_style_context_get_property: assertion ‘GTK_IS_STYLE_CONTEXT (context)’ failed: ‘glib warning’, file /var/tmp/build/firefox-c7aeef1139f0/toolkit/xre/nsSigHandlers.cpp:167

(Tor Browser:31323): Gtk-CRITICAL **: gtk_style_context_get_property: assertion ‘GTK_IS_STYLE_CONTEXT (context)’ failed
[Parent 31323, Main Thread] WARNING: gtk_style_context_get_property: assertion ‘GTK_IS_STYLE_CONTEXT (context)’ failed: ‘glib warning’, file /var/tmp/build/firefox-c7aeef1139f0/toolkit/xre/nsSigHandlers.cpp:167

(Tor Browser:31323): Gtk-CRITICAL **: gtk_style_context_get_property: assertion ‘GTK_IS_STYLE_CONTEXT (context)’ failed
[Parent 31323, Main Thread] WARNING: gtk_style_context_get_property: assertion ‘GTK_IS_STYLE_CONTEXT (context)’ failed: ‘glib warning’, file /var/tmp/build/firefox-c7aeef1139f0/toolkit/xre/nsSigHandlers.cpp:167

(Tor Browser:31323): Gtk-CRITICAL **: gtk_style_context_get_property: assertion ‘GTK_IS_STYLE_CONTEXT (context)’ failed
[Parent 31323, Main Thread] WARNING: gtk_style_context_get_property: assertion ‘GTK_IS_STYLE_CONTEXT (context)’ failed: ‘glib warning’, file /var/tmp/build/firefox-c7aeef1139f0/toolkit/xre/nsSigHandlers.cpp:167

(Tor Browser:31323): Gtk-CRITICAL **: gtk_style_context_get_property: assertion ‘GTK_IS_STYLE_CONTEXT (context)’ failed
[Parent 31323, Main Thread] WARNING: gtk_widget_get_style_context: assertion ‘GTK_IS_WIDGET (widget)’ failed: ‘glib warning’, file /var/tmp/build/firefox-c7aeef1139f0/toolkit/xre/nsSigHandlers.cpp:167

(Tor Browser:31323): Gtk-CRITICAL **: gtk_widget_get_style_context: assertion ‘GTK_IS_WIDGET (widget)’ failed
[Parent 31323, Main Thread] WARNING: gtk_style_context_get_state: assertion ‘GTK_IS_STYLE_CONTEXT (context)’ failed: ‘glib warning’, file /var/tmp/build/firefox-c7aeef1139f0/toolkit/xre/nsSigHandlers.cpp:167

(Tor Browser:31323): Gtk-CRITICAL **: gtk_style_context_get_state: assertion ‘GTK_IS_STYLE_CONTEXT (context)’ failed
[Parent 31323, Main Thread] WARNING: gtk_style_context_get_property: assertion ‘GTK_IS_STYLE_CONTEXT (context)’ failed: ‘glib warning’, file /var/tmp/build/firefox-c7aeef1139f0/toolkit/xre/nsSigHandlers.cpp:167

(Tor Browser:31323): Gtk-CRITICAL **: gtk_style_context_get_property: assertion ‘GTK_IS_STYLE_CONTEXT (context)’ failed
[Parent 31323, Main Thread] WARNING: gtk_widget_get_style_context: assertion ‘GTK_IS_WIDGET (widget)’ failed: ‘glib warning’, file /var/tmp/build/firefox-c7aeef1139f0/toolkit/xre/nsSigHandlers.cpp:167

(Tor Browser:31323): Gtk-CRITICAL **: gtk_widget_get_style_context: assertion ‘GTK_IS_WIDGET (widget)’ failed
[Parent 31323, Main Thread] WARNING: gtk_style_context_get_state: assertion ‘GTK_IS_STYLE_CONTEXT (context)’ failed: ‘glib warning’, file /var/tmp/build/firefox-c7aeef1139f0/toolkit/xre/nsSigHandlers.cpp:167

(Tor Browser:31323): Gtk-CRITICAL **: gtk_style_context_get_state: assertion ‘GTK_IS_STYLE_CONTEXT (context)’ failed
[Parent 31323, Main Thread] WARNING: gtk_style_context_get_background_color: assertion ‘GTK_IS_STYLE_CONTEXT (context)’ failed: ‘glib warning’, file /var/tmp/build/firefox-c7aeef1139f0/toolkit/xre/nsSigHandlers.cpp:167

(Tor Browser:31323): Gtk-CRITICAL **: gtk_style_context_get_background_color: assertion ‘GTK_IS_STYLE_CONTEXT (context)’ failed
[Parent 31323, Main Thread] WARNING: gtk_style_context_get_color: assertion ‘GTK_IS_STYLE_CONTEXT (context)’ failed: ‘glib warning’, file /var/tmp/build/firefox-c7aeef1139f0/toolkit/xre/nsSigHandlers.cpp:167

(Tor Browser:31323): Gtk-CRITICAL **: gtk_style_context_get_color: assertion ‘GTK_IS_STYLE_CONTEXT (context)’ failed
[Parent 31323, Main Thread] WARNING: gtk_widget_get_style_context: assertion ‘GTK_IS_WIDGET (widget)’ failed: ‘glib warning’, file /var/tmp/build/firefox-c7aeef1139f0/toolkit/xre/nsSigHandlers.cpp:167

(Tor Browser:31323): Gtk-CRITICAL **: gtk_widget_get_style_context: assertion ‘GTK_IS_WIDGET (widget)’ failed
[Parent 31323, Main Thread] WARNING: gtk_style_context_get_state: assertion ‘GTK_IS_STYLE_CONTEXT (context)’ failed: ‘glib warning’, file /var/tmp/build/firefox-c7aeef1139f0/toolkit/xre/nsSigHandlers.cpp:167

(Tor Browser:31323): Gtk-CRITICAL **: gtk_style_context_get_state: assertion ‘GTK_IS_STYLE_CONTEXT (context)’ failed
[Parent 31323, Main Thread] WARNING: gtk_style_context_get_property: assertion ‘GTK_IS_STYLE_CONTEXT (context)’ failed: ‘glib warning’, file /var/tmp/build/firefox-c7aeef1139f0/toolkit/xre/nsSigHandlers.cpp:167

(Tor Browser:31323): Gtk-CRITICAL **: gtk_style_context_get_property: assertion ‘GTK_IS_STYLE_CONTEXT (context)’ failed
[Parent 31323, Main Thread] WARNING: gtk_style_context_get_property: assertion ‘GTK_IS_STYLE_CONTEXT (context)’ failed: ‘glib warning’, file /var/tmp/build/firefox-c7aeef1139f0/toolkit/xre/nsSigHandlers.cpp:167

(Tor Browser:31323): Gtk-CRITICAL **: gtk_style_context_get_property: assertion ‘GTK_IS_STYLE_CONTEXT (context)’ failed
[Parent 31323, Main Thread] WARNING: gtk_style_context_get_property: assertion ‘GTK_IS_STYLE_CONTEXT (context)’ failed: ‘glib warning’, file /var/tmp/build/firefox-c7aeef1139f0/toolkit/xre/nsSigHandlers.cpp:167

(Tor Browser:31323): Gtk-CRITICAL **: gtk_style_context_get_property: assertion ‘GTK_IS_STYLE_CONTEXT (context)’ failed
[Parent 31323, Main Thread] WARNING: gtk_style_context_get_property: assertion ‘GTK_IS_STYLE_CONTEXT (context)’ failed: ‘glib warning’, file /var/tmp/build/firefox-c7aeef1139f0/toolkit/xre/nsSigHandlers.cpp:167

(Tor Browser:31323): Gtk-CRITICAL **: gtk_style_context_get_property: assertion ‘GTK_IS_STYLE_CONTEXT (context)’ failed
[Parent 31323, Main Thread] WARNING: gtk_style_context_get_property: assertion ‘GTK_IS_STYLE_CONTEXT (context)’ failed: ‘glib warning’, file /var/tmp/build/firefox-c7aeef1139f0/toolkit/xre/nsSigHandlers.cpp:167

(Tor Browser:31323): Gtk-CRITICAL **: gtk_style_context_get_property: assertion ‘GTK_IS_STYLE_CONTEXT (context)’ failed
Crash Annotation GraphicsCriticalError: |[0][GFX1-]: glxtest: libEGL missing methods for GL test (t=0.213142) [GFX1-]: glxtest: libEGL missing methods for GL test
Crash Annotation GraphicsCriticalError: |[0][GFX1-]: glxtest: libEGL missing methods for GL test (t=0.213142) |[1][GFX1-]: glxtest: libEGL missing eglGetDisplayDriverName (t=0.213163) [GFX1-]: glxtest: libEGL missing eglGetDisplayDriverName
[Parent 31323, Main Thread] WARNING: gtk_widget_get_style_context: assertion ‘GTK_IS_WIDGET (widget)’ failed: ‘glib warning’, file /var/tmp/build/firefox-c7aeef1139f0/toolkit/xre/nsSigHandlers.cpp:167

(Tor Browser:31323): Gtk-CRITICAL **: gtk_widget_get_style_context: assertion ‘GTK_IS_WIDGET (widget)’ failed
[Parent 31323, Main Thread] WARNING: gtk_style_context_get_state: assertion ‘GTK_IS_STYLE_CONTEXT (context)’ failed: ‘glib warning’, file /var/tmp/build/firefox-c7aeef1139f0/toolkit/xre/nsSigHandlers.cpp:167

(Tor Browser:31323): Gtk-CRITICAL **: gtk_style_context_get_state: assertion ‘GTK_IS_STYLE_CONTEXT (context)’ failed
[Parent 31323, Main Thread] WARNING: gtk_style_context_get_state: assertion ‘GTK_IS_STYLE_CONTEXT (context)’ failed: ‘glib warning’, file /var/tmp/build/firefox-c7aeef1139f0/toolkit/xre/nsSigHandlers.cpp:167

(Tor Browser:31323): Gtk-CRITICAL **: gtk_style_context_get_state: assertion ‘GTK_IS_STYLE_CONTEXT (context)’ failed
[Parent 31323, Main Thread] WARNING: gtk_style_context_get_border: assertion ‘GTK_IS_STYLE_CONTEXT (context)’ failed: ‘glib warning’, file /var/tmp/build/firefox-c7aeef1139f0/toolkit/xre/nsSigHandlers.cpp:167

(Tor Browser:31323): Gtk-CRITICAL **: gtk_style_context_get_border: assertion ‘GTK_IS_STYLE_CONTEXT (context)’ failed
[Parent 31323, Main Thread] WARNING: gtk_style_context_get_padding: assertion ‘GTK_IS_STYLE_CONTEXT (context)’ failed: ‘glib warning’, file /var/tmp/build/firefox-c7aeef1139f0/toolkit/xre/nsSigHandlers.cpp:167

(Tor Browser:31323): Gtk-CRITICAL **: gtk_style_context_get_padding: assertion ‘GTK_IS_STYLE_CONTEXT (context)’ failed
Fontconfig warning: “/home/gonzalo/tor-browser/Browser/TorBrowser/Data/fontconfig/fonts.conf”, line 178: blank doesn’t take any effect anymore. please remove it from your fonts.conf
Crash Annotation GraphicsCriticalError: |[0][GFX1-]: glxtest: libEGL missing methods for GL test (t=0.213142) |[1][GFX1-]: glxtest: libEGL missing eglGetDisplayDriverName (t=0.213163) |[2][GFX1-]: Invalid mBounds in OnSizeAllocate Rect(x=0, y=0, w=1, h=32642) size state 0 (t=0.638346) [GFX1-]: Invalid mBounds in OnSizeAllocate Rect(x=0, y=0, w=1, h=32642) size state 0
[Parent 31323, Main Thread] WARNING: gtk_widget_get_style_context: assertion ‘GTK_IS_WIDGET (widget)’ failed: ‘glib warning’, file /var/tmp/build/firefox-c7aeef1139f0/toolkit/xre/nsSigHandlers.cpp:167

(Tor Browser:31323): Gtk-CRITICAL **: gtk_widget_get_style_context: assertion ‘GTK_IS_WIDGET (widget)’ failed
[Parent 31323, Main Thread] WARNING: gtk_style_context_get_state: assertion ‘GTK_IS_STYLE_CONTEXT (context)’ failed: ‘glib warning’, file /var/tmp/build/firefox-c7aeef1139f0/toolkit/xre/nsSigHandlers.cpp:167

(Tor Browser:31323): Gtk-CRITICAL **: gtk_style_context_get_state: assertion ‘GTK_IS_STYLE_CONTEXT (context)’ failed
[Parent 31323, Main Thread] WARNING: gtk_style_context_set_state: assertion ‘GTK_IS_STYLE_CONTEXT (context)’ failed: ‘glib warning’, file /var/tmp/build/firefox-c7aeef1139f0/toolkit/xre/nsSigHandlers.cpp:167

(Tor Browser:31323): Gtk-CRITICAL **: gtk_style_context_set_state: assertion ‘GTK_IS_STYLE_CONTEXT (context)’ failed
[Parent 31323, Main Thread] WARNING: gtk_render_background: assertion ‘GTK_IS_STYLE_CONTEXT (context)’ failed: ‘glib warning’, file /var/tmp/build/firefox-c7aeef1139f0/toolkit/xre/nsSigHandlers.cpp:167

(Tor Browser:31323): Gtk-CRITICAL **: gtk_render_background: assertion ‘GTK_IS_STYLE_CONTEXT (context)’ failed
[Parent 31323, Main Thread] WARNING: gtk_render_frame: assertion ‘GTK_IS_STYLE_CONTEXT (context)’ failed: ‘glib warning’, file /var/tmp/build/firefox-c7aeef1139f0/toolkit/xre/nsSigHandlers.cpp:167

(Tor Browser:31323): Gtk-CRITICAL **: gtk_render_frame: assertion ‘GTK_IS_STYLE_CONTEXT (context)’ failed
Exiting due to channel error.

For the meantime, you can downgrade to Tor Browser 11.5.8 (last stable for desktop before Tor Browser 12) by downloading from : Index of /tor-package-archive/torbrowser/11.5.8

  1. Looking at the logs, I think this is something unique to your system which is breaking the update. Doing the same installation steps once again for Tor Browser 12, can you tell us what you see in the Tor logs? To view the Tor logs right in the terminal, navigate to the Tor Browser directory and launch the Tor Browser from the command line by running:

./start-tor-browser.desktop --verbose

Or to save the logs to a file (default: tor-browser.log):

./start-tor-browser.desktop --log [file]

  1. Please also try running Firefox ESR 102+ and let us know if the behavior is replicated.

Thanks championquizzer.

The log attached in my first message was obtained after a clean install of the version 12.

I will inistall the previous 11.5.8 version that was running fine as I have planned to upgrade my machine to a newer Ubuntu version soon, and v.12 works fine in other machines I have.

I prefer not to install Firefox ESR so as not to initiate conflicts with the version I have.

Thanks again for your help.

echo 'user_pref("gfx.x11-egl.force-disabled", true);' >> tor-browser/Browser/TorBrowser/Data/Browser/profile.default/user.js