From Facebook to WhatsApp: when can you be fired for messages in posts and chats?

Legal rulings related to employees' social media posts and chats in instant messaging applications are increasing. What limits must be respected to avoid sanctions or dismissal? Is it allowed to criticise the employer on social media?

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Read the article (available in Italian) by Emanuele Licciardi in the "Corriere della Sera", Italy's most well-known daily newspaper.