Firefox Blocks The Loading Of Html Iframe

I want to load another page using HTML iframe but Firefox blocks it due to avoid security problems. . I've tried to chnage the 'https' to 'http' but it doesn't work. The error show

Solution 1:

The page https://anouar.stencila.io/gentsch2020/ is served with the following X-Frame-Options header:

x-frame-options: allow-from *.ojs3.josekarvalho.net

ALLOW-FROM isn't supported by any up to date browser, so it won't work. You either need to use SAMEORIGIN when possible or remove the header completely.

X-Frame-Options can be replaced with Content-Security-Policy: frame-ancestors <source>;, see MDN.