Here are the latest versions of these important plugins as of:

10-8-2019

Adobe Flash*

32.0.0.255
Adobe Reader 19.012.20040
Mozilla Firefox 69.0.2
   

*If you are using Firefox, you will need a separate version of the Flash update in addition to the one for IE.

Beta versions not considered.

Keep the above programs up to date, along with your OS and virus definitions, and you are likelier to be a happy camper.