Meta mask hacked like a passwords. See forums lice hashkiller, they cracked MANY metamask min 1 per week, 90-100% of wallets.
Meta mask not secure wallet.
Safe or not depends on the user. If you use metamask and you want to connect to a new website that doesn't have a reputation; it's better to use a new wallet and separate the main wallet from the wallet to be connected to websites. And of course, the better choice is to store your crypto assets in a hardware wallet.