UPDATE:

I love this extension. When I left my previous review I *had* done something wrong & I wasn't using it properly.
It took me a while to figure out but my displeasure came from 100% user error.

When I use the add on the way it's meant to be used, it works great. I've occasionally come across things that it wouldn't work with but it's been rare.

It's not high tech but it does what it says it does and it does it well.

I use this add on daily & I'm grateful for it.
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Previous review:

Either I've done something wrong or this just doesn't work on my computer. It either makes no difference or the difference is so small that I don't notice it at all.

Bummed, I really wanted it to work.