Firefox 52, which coincides with a new Firefox ESR version, comes with WebAssembly support, as well as new security features. The new ESR version should also be a significant security improvement for an upcoming Tor Browser release.
Firefox 52 Brings New ESR Version, Security Upgrades, And WebAssembly Support : Read more
Firefox 52 Brings New ESR Version, Security Upgrades, And WebAssembly Support : Read more