Try replacing the entire code in another search engine file,, with the one present in duckduckgo.xml, does it fix it? That would be an odd workaround, I know.
Or just backup your settings and create another FF profile ("firefox -P" in terminal).
Anyway the solution is probably easy but I don't know where that info could be stored, maybe asking in mozilla forum is the best help.
posted by <hidden> • 4 years and 6 months ago Link