This site appears to use a scroll-linked positioning effect. This may not work well with asynchronous panning; see https://firefox-source-docs.mozilla.org/performance/scroll-linked_effects.html for further details and to join the discussion on related tools and features!
Mae'r wefan hon i weld yn defnyddio effeithiau lleoli drwy sgrolio. Efallai na fydd hwn yn gweithio'n dda gyda phanio anghydamseredig; gw. https://firefox-source-docs.mozilla.org/performance/scroll-linked_effects.html am wybodaeth bellach ac ymuno â'r drafodaeth ar yr offer a'r nodweddion cysylltiedig!