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.
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Hi, there is a hidden setting to change the background and toolbar areas to a dark mode, but the document will still follow the author's colors, so that's probably not what you're looking for.
But just in case you want to try it, here's how:
(A) In a new tab, type or paste about:config in the address bar and press Enter/Return. Click the button accepting the risk.
More info on about:config: Configuration Editor for Firefox. Please keep in mind that changes made through this back door aren't fully supported and aren't guaranteed to continue working in the future.
(B) In the search box in the page, type or paste pdfjs.viewerCssTheme and pause while the list is filtered
(C) Double-click the preference to display an editing field, and change the value to one from the below list, then press Enter or click the blue check mark button to save the change.
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Some programs for pdf have an option to change white background and black texts to
black background and white text.
I miss this option in firefox, so I have to use program as pdf viewer in linux
PDF Reader Dark Mode Options
Would be great for the PDF reader to have a setting, similar to reader view, for dark, light, or automatic background and toolbar colour
Edit: I was testing on a new profile and I noticed that dark mode does in-fact exist for the PDF reader and that privacy.resistFingerprinting is what's causing the 'issue'. As such, an interface allowing the user to toggle dark/light mode such as the one is reader view would be great!
I've been searching for a work around and I'm pretty disappointed. I'm studying all the time and this white theme will be the reason I'll go blind. 😞
It is possible to select colors for all web pages from the preferences: https://support.mozilla.org/kb/change-fonts-and-colors-websites-use.
If you want to do it for PDFs only, you can tweak the following prefs from about:config:
That proposed solution "works", but completely destroys all images in the document and renders them unintelligible, making it not a valid option for most PDFs. Those color settings really need to not affect media, or even better, Firefox should just respect browser dark mode settings for PDFs to begin with. Reading a blinding fullscreen-white document at night is genuinely migraine-inducing.
If you type into the console:
window.PDFViewerApplication.pdfViewer.container.style.filter = "invert(1) grayscale(1)"
the pdf will be inverted and black and white. This is my preferred dark mode because it doesn't affect the readability of the pdf, and doesnt leave the pictures inverted.