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PDF viewer background customization

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Mark Lavrentyev
Mark Lavrentyev
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Hi, Firefox used to have a nice dark-gray background behind the actual pdf in the pdf viewer. Since the latest update, it's now a bright white, which is a non-starter for working in the evening.

How can I revert to the old pdf viewer (or at least emulate the background color) without reverting my firefox version? Thanks!

Hi, Firefox used to have a nice dark-gray background behind the actual pdf in the pdf viewer. Since the latest update, it's now a bright white, which is a non-starter for working in the evening. How can I revert to the old pdf viewer (or at least emulate the background color) without reverting my firefox version? Thanks!