An exploit for CVE-2019-17026. It pops xcalc and was tested on Ubuntu (x64).
CVE-2019-17026 - A Firefox JIT bug
Original bug caught in the wild by Qihoo 360
Exploit written by maxpl0it
Works on Firefox < 7201
This is an exploit for CVE-2190-17026:
IonMonkey type confusion with StoreElementHole and FallibleStoreElement
This exploit does not use a sandbox escape, so for testing the securitysandboxcontentlevel attribute in about:config need