beta version (5.1.1130.26)

[QZMTCH]

Все прекрасно открывается и работает в CentBrowser. Смотрите мой пост выше.

а в старом центе всё открывается и без юзерагентов

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Yes, --disable-windows10-custom-titlebar is not supported in this version.
There are too many switches in Chromium, almost every upgrade will deprecate some of them.
Besides the one above, what other switches are invalid?

I'm still looking for broken flags, here's a bug and one question
"open_in_tab": true 
in extension manifests does not open settings in the tab

https://i.imgur.com/Jvr0ZFV.png Is it possible to remove notifications about an unsupported flag?