Not yet stable

For a given set of browsers, what APIs are not yet in all of them.

Example Comparisons
Browsers
Features

Summary

A count of the number of APIs are in Browser X but not in Browser Y.
Not in FirefoxNot in Safari
In Firefox 10
In Safari 2

Unstable APIs

Below is a list of features that are not in all of Firefox and Safari

Raw Data

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WebAssembly Data

API First Browser Date Days in Limbo Notes
webassembly.api.Exception.stack Firefox5/3/20221416
webassembly.api.Module.Module.compile_options 📋Firefox1/7/2025436
webassembly.api.Tag.type 📋Safari12/13/20211557
webassembly.api.compileStreaming_static.compile_options 📋Firefox1/7/2025436
webassembly.api.compile_static.compile_options 📋Firefox1/7/2025436
webassembly.api.instantiateStreaming_static.compile_options 📋Firefox1/7/2025436
webassembly.api.instantiate_static.compile_options 📋Firefox1/7/2025436
webassembly.api.validate_static.compile_options 📋Firefox1/7/2025436
webassembly.branch-hinting 📋Safari9/12/20221284
webassembly.memory64 📋Firefox1/7/2025436
webassembly.multiMemory 📋Firefox4/16/2024702
webassembly.relaxed-SIMD 📋Firefox12/9/2025100