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Fix incorrect page number rendering in uncover theme on PDF rendered by Firefox - #735

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yhatt merged 3 commits into
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firefox-enable-context-properties
Jul 17, 2026
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Fix incorrect page number rendering in uncover theme on PDF rendered by Firefox#735
yhatt merged 3 commits into
mainfrom
firefox-enable-context-properties

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@yhatt yhatt commented Jul 17, 2026

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ref. marp-team/marp-core#424 (comment)

Due to a long standing Firefox bug #1529152, page numbers on uncover theme have incorrect PDF rendering if used --browser firefox.

In Marp Core v4.4.0, we've shipped a workaround for correct page number rendering on PDF only when enabled svg.context-properties.content.enabled in about:config.
https://developer.mozilla.org/en-US/docs/Web/SVG/Reference/Attribute/fill#context-fill_example

Marp CLI enables it for better PDF rendering of uncover theme with FIrefox backend.

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yhatt added 3 commits July 18, 2026 06:56
There are no known rendering issues with Marp's built-in themes in
Firefox at the moment.
@yhatt
yhatt merged commit fc7eb78 into main Jul 17, 2026
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yhatt deleted the firefox-enable-context-properties branch July 17, 2026 22:52
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