- tab webviews now share a WebContext backed by the profile dir
(~/.local/share/RustyWolf); WebKitGTK keeps cookies in memory unless a
persistent store is set, which made youtube.com re-show the consent
wall on every launch and made logins impossible to keep
- default user agent is WebKit's native one instead of the malformed
fake-Chrome + RustyWolf string that pushed sites into Chromium-only
code paths; --ua-chrome adds a clean Chrome UA as fallback
- --private keeps using an ephemeral in-memory session
- README: document --ua-chrome and the persistent profile
