Essential - Rated 5 out of 5 stars
The most absolutely essential addon that I've got - and I use 70 of them. For those of us with a couple of hundred search engines, the integration with "Organize Search Engines" is superb. I found that once my search engine list started to grow, I stopped selecting search engines in the drop-down. Instead, I just use the keyboard shortcuts. (y906 - I'll point out that you don't have to click on the folder for the search engines to show, you just have to drag your mouse over "Organized Search Engines".)
And, the developer is very responsive.
Don't miss this one!