[lubuntu] Firefox + flash + java

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http://ubuntuforums.org – I'm having a hard time trying to figure out how to update the plugins - gnash isn't listed in the add-ons in firefox, and mozilla's plugin checker said my java is disabled due to being an outdated version. I've been trying to update both, and I'm stuck. I downloaded the source for java, tried to build it but I think I messed something up. My main purposes are using the folder upload in google drive (java), and the memrise.com flashcard site (flash). My googling has come up short for any solutions. (Hardware)