This is about the only way to use flash now on any OS.
But it also brings up the larger issue. Flash is dead … not dying … dead. The fact that there are still releases of flash updates is more akin to ‘embalming the corpse’ than anything else. Therefore continuing to use it means that you’ve tied yourself to a problem that will get larger and worse over time.
Well, you can …
But you definitely shouldn’t.
Now is the time to sort out alternatives that work for you and your workflow.
“If it ain’t broke don’t fix it” - is the correct expression here. To change metaphors, while you can keep driving a truck with no brakes and no way to get spare parts ‘because it still works’, the fact is it’s not a viable option going forward because it’s not serviceable, it is in fact broken.