Conflict Dragon and the extension HTTPS Everywhere

For about a month I was having an issue with ‘Flash player has crashed’ (did not perform an extension check for that issue).

Yesterday on some sites, Comodo Dragon was showing white space where a youtube video should appear. Today I set about disabling extensions to isolate the issue. After disabling HTTPS Everywhere (version 2014.4.25) youtube videos show on sites that were previously showing white space.

Comodo Dragon Version - Version
Windows version 64-bit Windows 7 (fully updated)
UAC status- default
System Drive where Windows C:
Comodo Dragon is installed - default
User privileges - administrator