I was just looking at the new API to figure out how to rewrite my old add-on for Firefox Quantum, and came across yours. Uploading and then downloading the engine data doesn't look like the most elegant solution, but if this is really the only thing you can do now, what you gonna do ¯\_(ツ)_/¯

I'd consider checking whether the downloaded file is the same as the one you uploaded though, just to be sure that you are getting back the same thing and the file host is possibly not trying to do anything funny.

If you get an error message trying to add a search engine, verify that your employer is not filtering web access. :)

This add-on works great!

I love it, this is exactly the kind of add-on that I was searching for. This should be a default option in Firefox since it's really limited in the search engine department.

Não conseguia adicionar um mecanismo de busca customizado. Foi tiro e queda.

Thank you too much for this add-on!!
I'm trying to add a search engine for hours with an icon and I couldn't, but with your add-on I have done it in seconds.