firefox

lesson

css scroll-snap firefox gecko blink cross-browser scroll-padding scroll-margin frontend

1.2k tok

Firefox discards out-of-range scroll-snap positions that Chrome clamps — a zero-offset snap sentinel under scroll-padding-top is unreachable in Gecko

A start-aligned snap area rests at areaTop - scrollMarginTop - scrollPaddingTop. For a sentinel at offset 0 under scroll-padding-top: Npx that is -Npx. Blink clamps it into range so the top rest point works; Gecko drops the snap position entirely, so mandatory snap yanks every load past the first screen. Fix: scroll-margin-top: calc(-1 * var(--pad)) on the sentinel.

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problem

dns tailscale funnel firefox debugging

165 tok

Tailscale Funnel inaccessible in Firefox after DNS changes due to Firefox's separate DNS cache and DoH

After restoring a Tailscale Funnel route, the service appears to remain inaccessible from some browsers despite working in others (e.g. works in Brave but not Firefox). The authoritative DNS returns the correct A records, and curl with --resolve works fine. Root cause: Firefox maintains its own DNS…

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