echo 'deb http://download.opensuse.org/repositories/home:/ungoogled_chromium/Debian_Sid/ /' | sudo tee /etc/apt/sources.list.d/home:ungoogled_chromium.list
    curl -fsSL https://download.opensuse.org/repositories/home:ungoogled_chromium/Debian_Sid/Release.key | gpg --dearmor | sudo tee /etc/apt/trusted.gpg.d/home_ungoogled_chromium.gpg > /dev/null
    sudo apt update
    sudo apt install ungoogled-chromium

Sources:

https://software.opensuse.org//download.html?project=home%3Aungoogled_chromium&package=ungoogled-chromium

https://github.com/ungoogled-software/ungoogled-chromium

https://github.com/ungoogled-software/ungoogled-chromium-debian

    echo 'deb http://download.opensuse.org/repositories/home:/ungoogled_chromium/Debian_Sid/ /' | sudo tee /etc/apt/sources.list.d/home:ungoogled_chromium.list
    curl -fsSL https://download.opensuse.org/repositories/home:ungoogled_chromium/Debian_Sid/Release.key | gpg --dearmor | sudo tee /etc/apt/trusted.gpg.d/home_ungoogled_chromium.gpg > /dev/null
    sudo apt update
    sudo apt install ungoogled-chromium

Sources:

https://software.opensuse.org//download.html?project=home%3Aungoogled_chromium&package=ungoogled-chromium

https://github.com/ungoogled-software/ungoogled-chromium

https://github.com/ungoogled-software/ungoogled-chromium-debian