Cfrgtkky

Brave installed from snap was running perfectly fine for months.
Since two days it is not starting when clicking Brave icon from launcher.
When attempting to run Brave from command line just calling brave I am getting following warnings, browser starts but without all my profile data (bookmarks, configuration, history), and it is in unsafe --no-sandbox modee.

main.go:224: cannot change mount namespace of snap "brave" according to change mount (/snap/gtk-common-themes/818/share/icons/Suru /snap/brave/44/data-dir/icons/Suru none bind,ro 0 0): cannot use "/snap/gtk-common-themes/818/share/icons/Suru" as bind-mount source: not a directory

Gtk-Message: Failed to load module "canberra-gtk-module"

Gtk-Message: Failed to load module "canberra-gtk-module"

Gkr-Message: secret service operation failed: An AppArmor policy prevents this sender from sending this message to this recipient;

It looks like snap-AppArmor integration issue.

Ubuntu 18.04.1 LTS.

snap version

snap    2.36.2

snapd   2.36.2

series  16

ubuntu  18.04

kernel  4.15.0-42-generic

apt policy apparmor

apparmor:

  Installed: 2.12-4ubuntu5.1

snap info brave

name:      brave

summary:   A browser with your interests at heart.

publisher: Brave Software (brave*)

contact:   https://community.brave.com/

license:   unset

description: |

  Browse faster by blocking ads and trackers that violate your privacy and

  cost you time and money.

commands:

  - brave

snap-id:      uE3hSmGE91m9MpbDEnUWi2vpeumH6gmv

tracking:     stable

refresh-date: today at 10:26 IST

channels:                              

  stable:    v0.56.12-5.dev (44) 160MB -

  candidate: ^                         

  beta:      ^                         

  edge:      ^                         

installed:   v0.56.12-5.dev (44) 160MB -

The solution presented here is to use:

sudo usysconf run -f

Additionally in the link another user points out you don't need to use snap because brave is in the repo's now. You can download the brave .deb installation package here.

The Brave browser snap package has recently been updated, and it may have lost some of its saved settings when the brave snap package was refreshed two days ago. Open Brave browser from the terminal with the following command:

snap run brave  

Ignore any warning messages that you receive in the terminal. Brave browser will open normally by clicking on its icon in the Dash after you have entered your new settings in the Brave welcome tour screens and saved the changed settings.

You can access the Brave browser welcome screen and take the welcome tour to import bookmarks from Firefox and customize your preferences by typing the following address in the address bar:

brave://welcome/

Open Firefox and export the Firefox bookmarks to your desktop as an .html file. You can import the Firefox bookmarks into Brave browser from the welcome tour or else click the three horizontal lines Customize Brave icon in the upper right corner of Brave browser -> select Bookmarks -> Import bookmarks and settings -> put a check in the checkbox to the left of Favorites/Bookmarks -> click Choose file button -> browse to the Firefox bookmarks HTML file that you saved.

Not a real solution but at least it allows me to access my profile data in Brave.

sudo snap revert brave

Now Brave starts normally.