Specifies whether SharedArrayBuffers can be used in a non cross-origin-isolated context

Specifies whether SharedArrayBuffers can be used in a non-cross-origin-isolated context. A SharedArrayBuffer is a binary data buffer that's used to create views on shared memory. SharedArrayBuffers have a memory access vulnerability in several popular CPUs. If you enable this policy, sites are allowed to use SharedArrayBuffers with no restrictions. If you disable or don't configure this policy, sites are allowed to use SharedArrayBuffers only when cross-origin isolated. Microsoft Edge requires cross-origin isolation when using SharedArrayBuffers from Microsoft Edge version 91 onward for Web Compatibility reasons.