The latest version of Flash Player is 19.0.0.245, which was released a couple days ago. Go directly to adobe.com to acquire same.
When you install it, just before finishing it asks how you would like to access updates. I always check the box which states never to update automatically. I always go to Adobe independently.
I'm running Adblock Plus (2.6.11) on Firefox 41.0.2 with popups blocked as well and don't encounter popups at all.
