Flash won't work on Windows XP machine
On my Windows XP machine, with FF 45.0.2 and the latest version of Flash Player, none of the Web sites that require Flash will play. A few weeks ago I had no problem, but there have been several FF and Flash updates since then. Example: When I try to listen online to SiriusXM, I get a screen that says I am lacking Flash version 11.0 or newer [I have 21.0.0.213] On my Windows 10 machine with same version of FF and Flash, I have no problems. I thought maybe FF was corrupted so I uninstalled and downloaded a new copy, but that didn't make a difference. [NOTE: I *think* I uninstalled FF--I did it from the "remove programs" tool, and then used another browser to download a new copy. But when the new copy was installed, it instantly looked the same--had my Sync running, had my previous add-ons running, etc. So maybe I need to clear something else??]
Opaite Mbohovái (2)
There are multiple versions of Flash. Chrome comes with the Pepper version, IE uses the ActiveX version, whereas Firefox uses the Plugin version of Flash.
Check the Windows Control Panel > Add or Remove Programs and verify that you do have the Plugin version of Flash Player 21.0.0.213 installed. Your More System Details next to your posting shows a lot of Plugins available for Firefox, but Flash isn't one of them.
Whichever browser you use to download Flash is the version you're going to get from Adobe. So make sure you use Firefox when downloading Flash.
Thanks -- but that didn't solve the problem. I, too, noticed that Flash wasn't in my Firefox Plug-in List and thought that was odd. Flash Settings Mgr (via Control Panel) says that I have downloaded the NPAPI Plug-in version of Flash. Using Firefox, I tried to download another copy of the latest Flash player from the Adobe site and it STILL doesn't show up in my Add-ons list--and sites with Flash content still aren't playing.