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This update is currently rolling out on Google Play.
The only change in this update is the flash mode UI's compatibility with Android Oreo. The graphics driver used has been updated to cope with the new changes (probably Treble related).
No further extensive compatibility testing has been done yet, but the quick tests I have done seem to work fine.
Aside from that, it has come to my attention that if you're using root with modules, sometimes these modules prevent FlashFire from working. Not sure yet exactly why, but if FlashFire doesn't work for you, try (temporarily) disabling all modules and trying again.
Discussion thread on XDA:
By modules you mean what? Magisk modules?
Does it support Google pixel/xl? And can we flash supersu after image/ota update?