Fixes
- Update single-file-core to 1.6.40: a stylesheet modified by the page's scripts is read back through its CSSOM serialization, and Firefox serializes a media or container feature value above the largest float as
(max-width: infinity * 1px), which no browser parses back, so every rule under such a query was dead in the saved page. styled-components writes its open-ended last breakpoint that way, and on liberation.fr the saved page lost the column gaps of the main grid at wide viewports, so the columns and their photos widened. The value is now written as the largest finite length, which every browser reads back. Firefox-only release: the Chromium and Edge builds are not affected, since Chrome serializes the value as a finite length already.