Attached is a screenshot.

Type about:addons<enter> in the address bar to open the Add-ons Manager. Hot key;’’'<Control> (Mac=<Command>) <Shift> A)

On the left side of the page, select Plugins. Make sure the ones you want to use are set to Ask or Allow. ++++++++++++++++++++++++++++++++++++++++ Go to the web page. Once the page is loading, mouse to the address bar and Left-click the icon. Select Permissions. In the menu, Make sure the ones you want to use are set to Ask or Allow.

Is there any pattern to the sites where the plugin notification panel drops down? For example, does it appear on Adobe's help page:

https://helpx.adobe.com/flash-player.html

The plugin notification panel should not open by itself, only when you click the icon. If it is auto-opening, that might be caused by an incompatibility with an add-on, or perhaps a touchscreen issue, if you have a touchscreen display.

jscher2000 said

Is there any pattern to the sites where the plugin notification panel drops down? For example, does it appear on Adobe's help page: https://helpx.adobe.com/flash-player.html

No (to Adobe). Now that you ask, I can't recall ever seeing it on any site but (the very dubious) http://www.stream2watch.cc/watch-tv/united-states/disney-channel-live-stream, which is not working now anyway. I think I'll just give up on the site.

FredMcD said

Type about:addons<enter> in the address bar to open the Add-ons Manager. Hot key;’’'<Control> (Mac=<Command>) <Shift> A) On the left side of the page, select Plugins. Make sure the ones you want to use are set to Ask or Allow. ++++++++++++++++++++++++++++++++++++++++ Go to the web page. Once the page is loading, mouse to the address bar and Left-click the icon. Select Permissions. In the menu, Make sure the ones you want to use are set to Ask or Allow.

Thanks. The issue is moot for now since I will be avoiding the offending site. I have filed the information for possible future reference.