http://secure45nbquibuw6thmenrfamhobdkkrllgxrtayn4sgmnexremexyd.onion/firefox-chromium.html
Examples of such include constant blinding and NOP insertion . Firefox attempted to harden the JIT engine by adding a so-called "W^X JIT", but this fails to hinder actual exploits as it is vulnerable to a race window in which an attacker can
write their shellcode to the memory mapping when it's writable and wait for the engine to transition it to executable.