Mmm, I see the ambiguity. It's meant to mean that "the combination of Firefox + AdBlock Plus will use less memory than it did previously", not "Firefox + AdBloc

Mmm, I see the ambiguity. It's meant to mean that "the combination of Firefox + AdBlock Plus will use less memory than it did previously", not "Firefox + AdBlock Plus will use less memory than Firefox alone". The fix will also reduce the memory usage of Firefox when used without AdBlock Plus, but the difference will be small.