GeckoAppShell.getPluginDirectories takes about 100ms on the gecko thread before even loading libxul on my Nexus S with the flash plugin. This should be made faster if that's at all possible, or delayed.

This line is responsible for most of the overhead. http://hg.mozilla.org/mozilla-central/file/4ffb23062b3b/mobile/android/base/GeckoAppShell.java#l1885

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