The standalone uninstaller will uninstall Flash Player 9 ActiveX from Windows 7 and below, and Flash Player NPAPI & PPAPI (except for PPAPI embedded in Chrome) on any system. The uninstaller is posted at -player/kb/uninstall-flash-player-windows.html - note that this does NOT remove any version of Flash Player embedded in the browser by the browser vendor.
Chrome used to communicate with its embedded copy of the Flash player using an interface called NPAPI. But that was an old interface and, over time, it got in the way of change. Justin Schuh of Google wrote
A standalone version can be installed with the flashplayer-standaloneAUR package, which continues to work without a time bomb. For the browsers that still support it, flashpluginAUR (NPAPI) and pepper-flashAUR (PPAPI) provide the last plugin from Adobe but patch it to remove the "kill switch" from it.
1a. And just in case the adobe-flashplugin package is missing, you may not have the "Canonical Parter" repo activated in Software & Updates / Software Sources, see Ubuntu's help page for 14.04 trusty or 16.04 xenial.
I've got adobe-flashplugin installed, but there's several "adobe flashplugin" packages available, trying to install a different one wants to remove this one first. I think adobe-flashplugin is the version you'd want, apparently from these Q's What's the difference between flashplugin-installer and adobe-flashplugin? and flashplugin-installer vs. flashplugin-nonfree vs. adobe-flashplugin the difference is:
If you're using the Chrome/Chromium browser, it uses it's own Pepper flash player that is currently the same version for Windows & Mac & Linux. Chrome has it already embedded, while Chromium requires a package install.
(FYI, The Difference between Google Chrome and Chromium on Linux)
Fresh Player Plugin is just a wrapper for libpepflashplayer.so so it needs this file which is bundled with Google Chrome. The easiest way to get this file is to simply install Google Chrome Stable - download it from here, then install it. That's it!
At some time or other there had been a problem that had me cursing Adobe. Apt had at least two versions of an adobe flash installer and downloader. There seemed to be no documentation... And some window kept popping up.. etc. But really, just uninstall from the Software Centre and then reinstall, and all the spanners that seem inherent in Adobe's awkward-squad install just disappear.
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