I used to use it regularly, but after updating to Windows 11 the other day, I couldn't use it anymore.
I don't know if it's Windows 11, Firefox, extensions, something else, or all of the above, but it's very disappointing.

Simple and easy to use. Does what it says it does. Nicely done!

Fantastic add-on! Allows for easy addition of custom search engines to Firefox. Perfect for integrating services like Morphic. User-friendly, effective, and a real must-have for anyone looking to expand their search options. Works flawlessly and saves a lot of time. Great kudos to the developer Tom Schuster for this useful tool!

Gets the job done in a simple and cleanner manner.

终于干掉CSDN啦

太好了，终于屏蔽掉垃圾的 CSDN !!

After the mycroft project stopped working, I was completely lost as to how I would add another custom engine. This extension worked like a charm!

Sehr nützlich!
Hiermit kann auch die defekte Amazon-Suche wieder hergestellt werden.

Extremadamente util.

I'd give this 5 stars, except the instructions to use it aren't at all clear.

How I got it to work (to add google.co.uk as a default to google.com) in Windows Firefox v 126.0 64bit:

1) add (ie, install) the extension
2) restart FireFox
3) Right-click search box. You'll then be given the option to add a custom search; click this, then enter the details. Finish.
4) go to firefox->settings->search and your new custom search engine should appear at the bottom of the "Default Search Engine" drop-down list. Choose it.
5) Voila!

I don't like running extensions when not in use, so I turned it off. When I restarted FireFox, my choice (google.co.uk) was still active.

Thanks @Tom Schuster