For several weeks now, whenever I use https://software.opensuse.org/search it
pops a box on a light red background with various errors.  The message that
consistently appears this week and last has been "undefined method `filter!'
for []:Array".

This is on MozillaFirefox-61.0.2-1.1.x86_64 from Tumbleweed version 20180928.

I can use w3m to the same URL and results are delivered, of course not as
beautifully presented as what we're used to when Javascript is available. 
(Jimc says: Client-side scripting is an invention of the devil.)