Love this extension. These days search engines are giving you 25+ years of internet history by default, and for many subjects that can be a lot of old data that is not relevant. I used the extension to add a date range filter to the past year by adding "&df=y" to the URL.
Example
Pattern: h++ps://duckduckgo.com/*
Redirect: h++ps://duckduckgo.com/$1&df=y

Replace "+" with "t" had to change in order for site to allow post.