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...

I used this to create url bar search for youtube

Love it. Makes searching so much easier.

Works as advertised.

Excellent and easy way to add a custom search engine! It takes most of the technical details out doing this powerful task. Nice workaround for WebExtensions limitations using the paste & right-click method :-)

Great implementation of something that should 100% be a built in feature. (It is in firefox mobile why not desktop?). Very easy to use and a real time saver.

Really quick a simple extension to bring back Google Search in Firefox

Please update the extension to work also on website that use the symbol "-" instead of "+" between words. Example "manchester-city" and not "manchester+city"

Ace! Add google I'm Feeling Lucky with the following URL:

https://www.google.com/search?q=%s&btnI=I%27m+Feeling+Lucky

Any chance of getting this for Opera GX?

The built in "add search engine" feature frequently gives broken icons for the sites i add, resulting in me having to manually go through each icon to find the site i want. this addon fixes that by allowing me to specify my own icon!

helpful

No longer able to add the default favicon (magnifying glass). I tried to add that but constantly get redirected to the icon of the website I want to add. No default favicon link provided in "Icon (optional)"

Worked great, thank you VERY much!