According documentation :
If the |no_javascript_access| value is set to false the new browser will not be scriptable and may not be hosted in the same renderer process as the source browser.
Could you please explain the meaning of "scriptable" and what restrictions this flag applies to window or what it's actually affect.
The problem is that since some of the version higher than 73, in 79 for sure, open.window script with combination of CefResponceHandler, stop works so fast because of creation of renderer and some other chromium secondary process.
CefResponceHandler return web content from local file. In 73 cef all works perfectly, both instance share code with difference that in 75+ versions there is middle class ResourceRequestHandler.
In case when I enable no_javascript_access flag nothing happenned literally, windows opens fast but without content no response handlers called even no load events called.
If you need any additional info free to ask, suddenly i can't share a code(