[Jslib] newbie: remove locked file? find mozilla path?

[//chill]

  Hi, sort of newbie here, searched for answers but found none.

I've created a checkbox which basically copies the flash plugin and 
renames it, then copies it back to turn off obnoxious crap on web pages. 
Works ok, unless Mozilla is using flash, which then I cannot delete the 
file. Anyway around this?

Also right now I'm hardcoding the path to the plugin, but I'd prefer to 
have the path relative to Mozilla. But how do I grab the location of 
Mozilla? I know I can use the ChromeToPath function but is there 
something better, like an environment variable I can grab?

BTW jslib rocks!
Thanks
Chris Hill