Can't change Result Snippet Length setting in Firefox without javascript enabled

niigaki

Steps to reproduce:
Open https://kagi.com on Firefox ESR without javascript enabled.
Click settings icon on top left.
Click search tab.
Click Result snippet length combo box.
Search result per page combo box is opened instead...

Expected behavior:
Result snippet length combo box opened.

System info:
Firefox ESR 91.6.1
region: international
server: ASIA-EAST

Image/Video:

<Copy/paste or drag and drop to upload images or videos (up to 20MB)>

gabeio

this is also true of a few dropdowns in the appearance area. just seems like some ids in the html are identical causing the first dropdown on the page to open.

https://kagi.com/html/settings?p=appearance