Dark mode for Embedded pdf Viewer

[dpa]

Hello everyone...

I use Firefox a lot of years and i am very happy with the interface.

But i saw that there is no built-in option to change  the Mode of Embedded PDF Viewer in to Dark

Is possible to be implemented in the near Future...?

Thanks in advanced.

[Agentvirtuel]

Hello

If you'd like to try (and see) ui.systemUsesDarkTheme

Configuration Editor for Firefox
https://support.mozilla.org/en-US/kb/about-config-editor-firefox#w_adding-preferences
Adding preferences ui.systemUsesDarkTheme Number value 1

https://www.youtube.com/embed/JTkwNDFEViM

[Toni]

@Agentvirtuel 

Thanks, but that does not change pdf to black background.

[ETL]

@jscher2000 After Firefox v121 the pdfjs.viewerCssTheme pref does not work when resistFingerprinting is enabled.

[buhbuhbob]

PDF viewing has an "invert colours" option

It would be nice to be able to invert the colours of PDFs, to be able to read white text on black backgrounds. Firefox extensions that invert colours are blocked on PDF viewing.

[Jon]

(Note: similar ideas have been merged into this thread)