Abrowser prefs > help leads to a 404 page

The help button in Abrowser 34 preferences on different tabs (general, tabs, search ...) leads to 404 pages, e.g.

https://trisquel.info/en/wiki/prefs-main
https://trisquel.info/en/wiki/prefs-tabs
https://trisquel.info/en/wiki/prefs-search

(The easiest fix is to remove the help button and the best fix to populate the now missing pages with oodles of useful context related information.)