Fixes a bug, uses correct units Rated 5 out of 5 stars

This works great! Thanks! I didn't know there was an extension for this. It fixes Bug 26517: https://bugzilla.mozilla.org/show_bug.cgi?id=26517

And thanks for using the correct units. It's good to see open source software fixing the stupid status quo. Microsoft's practice of using "MB" to mean one thing here and another thing there is nonsensical.