Adob
e Flash received an update on April 21st 2016, and it's starting to affect usability. I had written a tutorial on how to upgrade your version a couple years ago, but here is some more current information.
To avoid following a link to a bogus download, I advise going directly to Adobe.com, then following the link to the Adobe Flash download. From there, you have to follow ALL the steps to download, launch and install the update (many people tend to simply click the ‘install now’ link and assume they’re done). The software will appear in your downloads folder, double click on the ‘.dmg’ file (it’s a disk mounted image) and launch the installer, then double click the ‘install flash player’ button, then agree to open the software. You’ll have to sign in with your computer login password to authenticate, then continue to follow the installation process. To complete it, you’ll have to relaunch your browser(s). Once done, you can continue to watch Youtube videos, view JacquieLawson e-cards, reserve ferries, etc.