On Special:Search on French Wikipedia, when you type a query in the research form, hitting "enter" or "search" button both don't work.
Tested on the two last versions of Firefox and Chrome. Users report this bug is not on En.wp. I'll see on other wikis if there is a similar problem.
Thank you @Krenair. I'll ask the community about what they plan to do with this script created by a user who has quit Wikipedia now.
https://fr.wikipedia.org/w/index.php?title=MediaWiki:Gadget-ExternalSearch.js&diff=116958299&oldid=114869179 - if you try adding debug=true to the search page URL it should work now, and soon without debug=true