Starting with Firefox version 62 for Mac, Adobe Flash applets will be run in a more secure mode using process sandboxing.
Read more about the threat of viruses and malware on the Mac and how to protect yourself here.
Many of the most prevalent Mac malware right now arrive on your Mac via a fake Flash Player download.Simply navigate to the webpage, which hosts flash file, you want to play, open the FLash player Extension, choose from detected flash files and click the Add button. Flash player is a well design Chrome Extension, which allows you to add any flash (swf) file into the app's playlist and access them by simply clicking FLash Player icon.Update Adobe Flash Player For Mac Os X 10.6.8.