Browser engine now works on Linux (Chrome/Chromium/Edge) without the old DISPLAY guard. Oracle will launch whatever chrome-launcher finds or what you pass via CHROME_PATH.
Cookie sync supports snap-installed Chromium automatically. Common cookie DB for the Default profile:
~/snap/chromium/common/chromium/Default/Cookies
If you use a non-default profile or a custom install, point Oracle at the correct paths:
Browser runs are headful (Cloudflare blocks headless). Keep a compositor/virtual display running if you don’t have a desktop session.
If cookie sync still can’t find your DB, rerun with --browser-allow-cookie-errors --browser-no-cookie-sync and sign in manually, or dump the session cookies with --browser-inline-cookies-file.