Your website is sometimes blocked by firefox about the mixed content included in your web pages.

Here is a description of the problem encountered

It seems that your web page haves images considered as passive mixed content.

Here is a way to fix your website , according to mozilla developpers.

Moreover , when the software premium trial "malwarebyte anti-malware" was activated on my PC , it warned me that a possible trojan was present when i clicked on the forum pages.But now the trial has ended and i have no more precision about the security level.
Perhaps it was only a message to inform potential clients that this software is efficient ?

Maybe you should fix it to avoid unnecessarily disturbing people ...