On Windows 7 Ultimate SP1 (x86) with "Windows 7 Basic" or "Windows Classic" theme, Supermium window title appears in Windows 10 style rather than Windows Vista style

[EgorKuzevanov]

Is it possible to fix this bug using chrome://flags?

[FK2FAGHMS]

Yes, go to chrome://flags/#disable-windows-10-custom-titlebar and enable it.

[EgorKuzevanov]

Yes, go to chrome://flags/#disable-windows-10-custom-titlebar and enable it.

Does not help. With the "Windows 7 Basic" and "Windows Classic" color schemes and also with 16-bit color depth (High Color), the Windows 10 style window title was and remains in Supermium.

[FK2FAGHMS]

In my version (7 Pro SP1 x64), there is no need to even turn it on, it shows the 7 style titlebar by default. And I use classic theme as well.

[XakerTwo]

can confirm the issue with title bar when classic or basic theme enabled (no chrome theme applied) suggested disable-windows-10-custom-titlebar flag has no effect as well also noticed #352 issue and absence of issue #605 (while title still usable and visible it always drop to classic but keep last shape) as workaround that will force solid-aero-like caption buttons can suggest apply any theme with custom frame (there no such mark in CWS - some authors show it on screenshot or state in description, otherwise can be checked by installation) use win32ss' suggestion below that is way better as bonus you can tweak buttons by editing resources in chrome_*00_percent.pak

bonus joke with basic theme

happens when moving mouse between buttons 

Windows 7 Ultimate SP1 (x64)

[win32ss]

You can also use the #force-xp-theme flag.