curl -s https://brave-browser-apt-release.s3.brave.com/brave-core.asc | sudo apt-key --keyring /etc/apt/trusted.gpg.d/brave-browser-release.gpg add
source /etc/os-release
echo "deb [arch=amd64] https://brave-browser-apt-release.s3.brave.com/ stretch main" | sudo tee /etc/apt/sources.list.d/brave-browser-release-${Continunn}.list
sudo apt update
sudo apt install brave-keyring brave-browser
ref : https://brave-browser.readthedocs.io/en/latest/installing-brave.html#linux
you will have an issue with the sandbox and namespaces. To fix this so that you don't have to run it without sandboxing, you need to enable userns kernel option. Below will temporarily enable it
$ brave-browser
[26285:26285:0504/225501.894338:FATAL:zygote_host_impl_linux.cc(116)] No usable sandbox! You probably need to enable user namespaces in your kernel. See https://brave-browser.readthedocs.io/en/latest/installing-brave.html#linux for more information.
Trace/breakpoint trap
echo 1 > /proc/sys/kernel/unprivileged_userns_clone
for permanently
echo 'kernel.unprivileged_userns_clone=1' > /etc/sysctl.d/00-local-userns.conf
service procps restart