I have a handy little script called `chrome-new` which I use whenever I want to browse one of those few sites that struggles with Firefox. It just starts a clean Chromium with a throw-away profile, then deletes it when I close the browser.

    #!/bin/sh
    TMPDIR=$(mktemp -d /dev/shm/chrome-XXXXX)
    chromium --user-data-dir=$TMPDIR --no-first-run --no-default-browser-check --disable-features=DefaultBrowserPrompt "$@"
    rm -rf $TMPDIR