I'm trying to click on link which opens another site, where I'm getting this 'Invalid certificate' popup. In previous versions of opera, it didn't appear. Is there anyway we can avoid it. I tried
OperaOptions options = new OperaOptions { Proxy = null };
options.AddArguments("opera.switches", "--disable-extensions");
options.AddArgument("--dns-prefetch-disable");
driver = new OperaDriver(path, options);
It didn't help. Here is the image 
Opera version - 40.0
At least can we send 'TAB' and 'Enter' to the browser directly using something like 'Actions'?