installing brave on Debian (specially on kali) linux is not an easy. so it can be painful. but suppose you install it any how but it is still painful to open brave. in fact, you can't open it without using --no-sandbox .And using --no-sandbox to open brave is extremely dangerous for your machine security. after many research, i found a very simple solution. STEP1: On machine, follow the official Ubuntu instructions and only change the following step: echo "deb [arch=amd64] https://brave-browser-apt-release.s3.brave.com/ $UBUNTU_CODENAME main" | sudo tee /etc/apt/sources.list.d/brave-browser-release- ${UBUNTU_CODENAME} .list to this: echo "deb [arch=amd64] https://brave-browser-apt-release.s3.brave.com/ bionic main" | sudo tee /etc/apt/sources. list .d/brave-browser-release-bionic. list STEP2: Then add the following in /etc/sysctl.d/00-local-userns.conf : kernel.unprivileged_userns_clone = 1 STEP3: finally run the following comma...