I prefer the preview in Firefox option for PDFs, rather than downloading PDFs and then viewing them. However the default white background on the preview hurts my eyes. So is there a way that I can: preview PDFs in Firefox without having to download them and with inverted colors?
p.s.: "Dark background and light text" extension for firefox does invert the pdfs and it is good. But my default global preferences for this extension are different. Is there a way to tell the extension to "always invert pdfs". I add this as a footnote, because a solution that doesn't rely on this method is also welcome.