Flash switcher?

In firefox, if you have multiple flash plugins installed and browse to a site that uses flash, a tiny icon will quietly appear in the lower-right corner. If you click this icon, a window will pop up with a drop-down that lets you select which plugin to use on the current web site (and maybe change the default for future web sites, I'm not sure).

However, this doesn't work if you use the flashblock extension. (I guess because firefox only checks for the presence of flash in the website when the website is first loaded, and with flashblock there is never any flash present.) It does work to disable flashblock (*not* using Add-ons -> Flashblock -> Disable, which requires a restart, but using Add-ons -> Flashblock -> Preferences -> Enable Flashblock), reload the page, click the little icon to fiddle with flash settings, and then re-enable flashblock.

This feature is generally a bit buggy for me and I've never seen it documented anywhere, but it WFM.