Metamask is currently one of the most advanced crypto wallets supporting ERC-20 tokens. Crypto users always compare it to Ethereum because it functions as the ideal wallet server to this blockchain. Nowadays, this wallet remains the safest and easiest in the crypto market but a possible disadvantage is that it's only compatible with this network. However, this is not a limitation because traders at all execute its altcoin transactions with financial freedom, and Ether is tradable in almost every exchange system currently existing.
JavaScript. on the other hand, is the supportive network behind Metamask. It boasts great functionality to this wallet and makes it safe without changes. In fact, before doing any operation the JavaScript system always sends permission requests.
Metamask's Safety
This wallet also remains as one of the safest and committed enough for user's privacy. It's always updating these features to offer clients a comfortable landscape. Metamask does not manage the private keys, but the user himself is the one who has full control of them. Besides, it has hardware wallet support, some of them could be Nano's products, as the basic ones. Privacy and anonymity are well-regulated through a fragmented website supported by VPN SERVER, the major objective is not to have it inside the network itself but this server.
In general, Metamask lets the client himself manage the fees according to what process is being requested. So, the fee amount depends just and only on the client. It's, perhaps, a supportive wallet to the Ethereum blockchain but with its autonomy.