Review for User Agent Switcher by Doyousketch2
Rated 2 out of 5 stars
I only use this on one or two sites...
As I'm sure is the case for EVERYBODY that uses it.
So it only makes sense that it should default to showing your standard Firefox string, unless you specifically change it for that site.
I shouldn't have to fiddle with menus every time I change a tab.
To create your own collections, you must have a Mozilla Add-ons account.