Monday, December 27, 2021

Firefox 95’s RLBox

Jack Wallen (via Hacker News, MacRumors):

RLBox is a new method of sandboxing, which makes it easy to efficiently isolate subcomponents and make Firefox more secure. RLBox uses WebAssembly to isolate possible buggy code.


How RLBox works is complicated, but it breaks down by first compiling a process into WebAssembly, and then the converted process is then re-converted into native code. What this does is prevent code from moving between different portions of a program and limits access to only specific areas of system memory.

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