"We’ve decided to disable plugin (not to be confused with add-ons, which are supported) support for this release."

Firefox for Maemo RC3 « blog.pavlov.net

For a while, I’ve always disabled both flash and Java from the plugins menu on firefox.  I never understood why people used things like flashblock when you could just click a button in the browser to turn them off.  It’s interesting to see Mozilla straight up just get rid of plugins on a platform.  Meaning my grant to the NIH on WebGL technologies is all the more urgent.