The only gripe I have is that it shouldn't work for Firefox, but after writing this I will try. There is a Ubuntu wiki article that describes the actions with screenshots, but the description of Selvakumar is totally accurate. Seems you can and that the procedure that Selvakumar wrote is the way to go. Chromium: Since I wanted to be complete and Chromium is the "Open Source version" of Chrome, I'd checked whether it was possible to add flash easily to that browser too.This plugin uses the old "NPAPI" technology to integrate in the browser. That flash plugin is flashplugin-installer. Adobe Shockwave Player provides access to dazzling 3D games and entertainment, interactive product demonstrations, and online learning applications. Now that isn't reason for concern as most sites will work just fine with Flash 11 and Adobe does provide security updates for that version. 478 million Web users have installed Adobe Shockwave Player around the world. (You can see this for yourself at " Adobe - Flash Player Test Page". The current Flash Plugin for Mozilla Firefox is at 11 and will never get a higher version. Mozilla Firefox: Adobe has discontinued any new versions of NPAPI Flash on Linux since a few years.This plugin in Chrome uses the newer "PPAPI" technology to integrate in the browser.
If, like me, you don't use Chrome that might be a problem. But over the last few years, Flash has become less common. For 20 years, Flash has helped shape the way that you play games, watch videos and run applications on the web.
Today, Adobe announced its plans to stop supporting Flash at the end of 2020.