Rated 5 out of 5 stars

Thanks to the previous reviewer for mentioning The Button. Another "duh" moment for me too. So now I only wonder, since the ticker IS a "bar", if it could be made selectable via toolbar menu, as I have many buttons already (Ah, yes, First World Problems;)

Just need to get in the habit now of killing the ticker before killing Firefox, otherwise my poor old T5500 chip takes awhile getting everything going again.

I wonder whether any developers have considered Delayed Startup for demanding extensions!

Yeah, I know I just need a better machine, but am going to check out the "FeedRoller RSS Ticker" app now. Others desiring egg in their beer may wish to do the same.

Very cool extension. Cheers!

This review is for a previous version of the add-on (13.1-signed.1-signed). 

As of version 13 (released today), the button is gone and you show/hide the ticker via View > Toolbars.