The bookmarklet will do its job for the moment - and for the next 10 years I guess. xpi file (it is just a ZIP archive) directly and settingĭid show a 'navajo white' background each time the page/thumbnails were loaded - only to be overwritten by the white background of the PDF page/thumbnail itself! So forget this route, you don't need it. And sepia is not at its full potential (in combination with the chosen invert percentage), bringing the white background of a PDF page to #F4DEB6 (or so tells me the color picker of gcolor2.) - which is quite close to my favorite 'Navajo White' (#FFDEAD).Īnd a plethora of settings taken from the original viewer.css of pdf.js did NOT bring ANY difference.Ĭhanging the viewer.css file inside the.

This does not transform the page to a bitonal document - it leaves an 'idea of color' in it that I find pleasing to the eye. You will find two options for the background. Here, you will find a 'Background' button. After opening the PDF file, click on the 'Edit' tab, as shown in the screenshot below. Now, select the PDF file that you wish to open. Following the 'bookmarklet approach' by I created a bookmark on my toolbar with the following variation in the code: Launch PDFelement and click on 'Open files' within the 'Home' tab.

Change pdf background color