Why after --disable-web-security and deleting x-frame-options header this error still showing?

Question

I'm creating a webapp in electron, a web-crawler with a neural network, which needs all webSecurities to be disabled

i tried modifying the headers (X-Frame-Origin,access-control-allow-origin etc..) , using flags like chrome --allow-file-access-from-files --disable-web-security --user-data-dir="" etc... nothing seems to remove the error above

The iframe is showing the ORIGIN restricted websites after i modified the xframe header, but when i try to access its document, the error above pops

i tried running it in chrome and firefox, and the same behaviour is encoutered

been googling for 4 hours now and i can't seem to find an appropriate answer. if you think this is a duplicated please include a link, it would help a lot

Answer 1

i found the solution ,the disable site isolation trial should be toggled on :

app.commandLine.appendSwitch('disable-site-isolation-trials')