Can someone suggest how to help people get Flash content on Firefox, Chrome, and Edge particularly

[peterfconn]

We currently use the following prose:

This survey for adults living in the United States is designed for laptop, notebook, and desktop computers.  Similar to many websites, it uses Flash, and before starting the survey, it may ask you to activate, enable, allow, or update Flash. (If Flash-related messages appear, please enable or activate Flash and allow it to run – note that it is not necessary to check for updates.)

But how about people who get a blank white screen? What can we tell them? Try another browser?

[jeromiec83223024]

Adobe Flash Player enabled but not recognized in Windows 10 Edge

Enable Flash Player for Firefox

Use or fix Flash audio & video - Computer - Google Chrome Help

[jeromiec83223024]

Also, to address your final question, being flexible about the browser you use is pretty good advice.  Each browser vendor has their own implementation of the click-to-play behavior, and they're all imperfect.  There's also not a lot of incentive to get it perfect.

The goal is explicit -- generate friction for end-users in an effort to force content providers to migrate their content to exclusively use HTML and JavaScript.  For a lot of content, that's totally feasible.

For the cases where Flash still provides superior capabilities or performance (mostly games and broadcaster-grade video to some degree), you have to adapt your guidance to a world where Flash Player isn't reliably detectable at launch.  That means modifying the content to provide useful guidance, instead of simply showing a white screen.  It's also going to be a cat-and-mouse game, as the browser vendors continue to increase the friction for users running Flash Player over the coming months.

At the moment, my personal opinion is that Firefox has done the best job implementing plug-in click to play.  Even in the edge cases where some kind of "click to activate" UI might not be displayed in the other browsers, Firefox seems to show the plug-in icon in the address bar consistently, allowing the user to discover the blocked plugin condition and successfully enable and remember that preference.