Is MetaMask Safe? — Extension Safety Profile

MetaMask is a well-known cryptocurrency wallet that manages digital assets and interacts with decentralized applications. To do this, it requests a broad set of permissions. The host access to all websites, local files, and local network ports like localhost:8545 allows it to inject its wallet interface into any page and communicate with local blockchain nodes or apps. Permissions like scripting, webRequest, and cookies let it modify or monitor network activity, while clipboardWrite can handle copying addresses. This is a powerful but expected scope for a wallet that must connect to every site a user visits.

For any crypto wallet extension, the main safety concern is that its extensive access makes it a prime target for phishing and impersonation. Users should always verify they are installing the authentic extension from the official store listing and be cautious of fake versions that look identical. The ability to read and write data on all websites means a compromised wallet could expose seed phrases or alter transactions, so keeping the extension updated and practicing good security hygiene is essential.

Looking at the fact sheet, the strongest dimension is Maintenance & Ownership, reflecting a well-maintained and actively updated product. The weakest is Permissions & Access, which is not surprising given the deep system integration a wallet requires but does lower the score due to the inherent risk of such broad access. The publisher's declared privacy practices state they collect user activity data and do not sell it, which aligns with the high Data & Privacy score.