A change at the DuckDuckGo search engine has broken multi-column add-on support. Possibly this is to accommodate the new engine in Firefox 57, but that’s just my guess.

Anyway, it’s broken and this is true of both DuckDuckGo – Multi-Columns v.9 | Userstyles.org and its fork DuckDuckGo – Multi-Columns Custom – FreeStyler.WS, therefore the fault must lie with a change in the code at the DuckDuckGo results page. Both Firefox and Pale Moon show the same behaviour.

Turning on autoscroll in DuckDuckGo’s internal settings doesn’t seem to fix it. Presumably the script will be fixed in the next week or so.

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Update: DuckDuckGo Multi-columns is now fixed: DuckDuckGo – Multi-Columns v.10 at Userstyles.org.

If you need to tweak the colours, either backup your existing tweaked script before updating and then port back snippets of code, or use my colour-tweaking guide to the code.

Note that, to access script editing, you no longer go to User Scripts, but rather to: the Firefox Extensions panel at Tools / Addons | Stylish | Click on the Stylish “Options” button | DuckDuckGo – Multi-Columns v.10 | Edit | Save.