Starting to dive into 𝙼𝚎𝚝𝚊𝙼𝚊𝚜𝚔 code today. 🦊 Was surprised to find that while most of the packages it uses (in the 𝙼𝚎𝚝𝚊𝙼𝚊𝚜𝚔/core repo) are MIT-licensed, the browser extension itself is under a proprietary, source-available license.