> also, how can I add this to my firefox search inside the address bar / search field?
Navigate to https://stract.com/ then focus the url field: Firefox will display the new search engine at the bottom of the suggestions, on the "This time, search with:" line.
I didn't see that option on mobile, but I got it added. Click the search provider icon in the search bar, go to search settings, then manage search providers, then add new. Add it with this url: https://stract.com/search?q=%s
That was hard to discover, thanks for your explanation.
I was looking in "Firefox Settings -> Search -> Search Shortcuts" for a way to add it. I guess the functionality is not used very often, but it would be nice to have a hint on how to add new Search Engines there.
Navigate to https://stract.com/ then focus the url field: Firefox will display the new search engine at the bottom of the suggestions, on the "This time, search with:" line.