Re: National Lottery Site on Firefox 34.0.5
Check your TLS settings. I've found on one of my computers (but not the other) that Firefox had an incorrect TLS setting in there, apparently it was 'user set' despite me having never set it... It may have gotten there through Firefox Sync synching an old setting from the cloud.
In about:config security.tls.version.max was set to "1". The NL site uses 1.2 and resetting this option back to '3' fixed it.
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