Several outlets and crypto programmers have pointed out for a year or more that MetaMask, by default, broadcasts your Ethereum public key (address) to websites you visit. The assumption is that this is a privacy vulnerability – most sites have no need for such information, after all. The Next Web’s David Canellis writes: “Sharing Ethereum addresses with any tracking service that requests it is certainly a little unsettling, but there are wider implications. Think of your Ethereum address as a unique identifier, you want to keep it separate from the rest of your online footprint at all times.” Public Addresses
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