Takes some trial and error to get things right, but it works if you are patient with it. Thanks a bunch!

The person who made this extension is cool and attractive

Simple, easy, lovely. This shit bussin'

This has been a go-to for me, but just now I noticed that it's not working anymore.
https://imgur.com/a/7f18QQl

Perfect. Embarrassing that Mozilla doesn't let us add custom engines natively. Thank you.

For the developer:
Is there a way to back up, save the searches that you have entered?

Saves having to go the website first. Thanks for this great add-on.

I desperately missed this feature after switching to Firefox from Chrome. It took a minute to configure (look for the blue search icon in the bar; read instructions on screen carefully), but has worked great since then.

This is very cool BUT you should add an choice for spacing ('+' is usually working, but sometimes you need '%20' or else)
Thanks anyway !
I finally added via a google "site:" search. Less cool but ok.
On github you tend to say that is impossible to patch, so I believe you and give you the five stars...