Screenshot you posted is not related to any antivirus, it is from browser which is blocking sites which are reported to Google Safe Browsing, and browsers as Firefox then use such database to block phishing / dangerous sites. In Firefox you can just click on Help -> Report Deceptive Site and report any phishing Electrum site. This will help those users who are not aware that we have fake sites which have only one goal, to steal coins from wallet.
И вoт cкpиншoт c вaшeй Electrum пpoгpaммы 3.2.3
https://i109.fastpic.ru/big/2019/0511/18/_1d58a3fd7e679d60788f91853701ba18.jpg
Этa жe вaшa пpoгpaммa!
https://i110.fastpic.ru/big/2019/0511/78/3df6cb57f7d7c791ff3277541848b578.jpg
https://i109.fastpic.ru/big/2019/0511/ce/2218075e921ebd2da4dc374e0f1a93ce.jpg