Not working in PDF viewing

[ghost]

According to some review and my experience on Chrome.

[yubo56]

This is currently working for me again, mark as resolved?

[ghost]

This is working for me only in Filter/Filter+ in Chrome and Vivaldi (on Chromium).
What about Firefox releases - I don't know, but I checked Dev Edition (60.0beta) and there is a completely different PDF viewer, where Dark Reader doesn't work in all modes.

[alexanderby]

Firefox viewer seems to be invertable. Chrome one is all in one component, it will be tricky to invert page only and it would be impossible to not invert images.

[shaybenmoshe]

It didn't work for me either a few days ago, but then a couple of days later it started working again (maybe the upgrade to Chrome 66 fixed that somehow).

Anyhow, now I saw the new Dynamic mode, and pdfs aren't inverted by it, nor by static (but they do by both Filter and Filter+).

Thanks for everything!

[yubo56]

^ - yup same experience here

[nimafazeli]

It does not work on firefox. I am using the last version of ff.
It is odd though because I remember it used to work in the past.

[Raijin56]

The darkification of PDF files works when using Filter+ (not with Dynamic). My usual solution is saving the config with Filter+ only for the current webpage, but it's annoying doing that with every site that have a PDF.

I suggest to apply Filter+ (if it isn't the default engine) to all PDFs.

EDIT: I forgot to say this is using Chrome 71.0.3578.98 with Dark Reader 4.7.5

[eromoe]

@Raijin56 What si Filter+ ???

[sbelharbi]

@eromoe they are talking about this

It seems to work on Chromium, Google Chrome but not on Firefox, nor Waterfox.

[timea-techgirl]

@rolagg Not possible to make local PDFs dark? My eye strains reading books on computer.

[sbelharbi]

if by local you mean desktop PDF reader, you can try Evince reader with the option Inverted Colors on. It gives the following results:

[timea-techgirl]

@sbelharbi Hey, thanks for the reply. I mean chrome's built-in PDF reader. I don't have any apps installed. I just drag a PDF to chrome. I wish the extension could make it dark too.

For now, the workaround is to upload the PDF to google drive and read it from there with dark reader extension.

[sbelharbi]

I see.

• I just tried reading a local PDF using Google Chromium, and the dark them does not work.
• Why not use desktop apps to read PDF files? it's more straightforward than using a navigator and go through Google drive. You can write notes/highlight text and so on on desktop apps (Okular for instance which has as well inverted colors, see below). It is tedious to go through a navigator especially if you want to keep track of your readings.
• FYI, If you are using it only to read books, you can use calibre to organise your library locally. It opens the default reader in the system, though.

[timea-techgirl]

I want to have as few apps as possible. Also an old system.

[sbelharbi]

going through Google drive is a solution, than.
hopefully, the team will add this option to be able to use the them for local files. cc @alexanderby

[MatrixRanger98]

Agreed with Raijin56. I suggest automatically applying Filter+ to all PDFs. Also, it seems that DarkReader can only accept the site-wise configuration. It would be much more helpful if we could use more customed pattern matching and I don't think there would be any difficulty to implement this feature.

[timea-techgirl]

For now, the workaround is to upload the PDF to google drive and read it from there with dark reader extension.

This is not working anymore. Pity. :(

[luo-chuan]

For the same online pdf page in Chrome, the plugin "Midnight Lizard" can invert the page's color, but "Dark Reader" can't.

[sbelharbi]

you may need to change your settings.
google chrome: Version 78.0.3904.97 (Official Build) (64-bit)

[eromoe]

@luo-chuan you need use Filter+ (过滤+)

[haobangpig]

I used the Filter+ mode, it works on the online pdf file, but not at the local pdf file.

[zbot473]

Filter+ Causes the Sidebar to become white.

[ele3131]

Black Sidebars would be GREAT! Maybe this turns out to become a 'PDF Mode'

Filter+ isn't perfect for the job yet. (Better than nothing though)

[Franck-Dernoncourt]

How can I configure the Dark Reader Google Chrome extension so that the Filter+ mode is only activated for PDFs? For the other webpages I want to keep the dynamic mode. Also, how can I change the grey background of the PDF preview in Google Chrome to black?

[cool-RR]

Hey, I've had this problem of local PDFs not becoming dark. I switched to Filter+, and it worked on my desktop, but not on my laptop. I ensured they're both the same version (4.9.5). Any idea why it wouldn't work on my laptop? Maybe your new change would fix it? Has it made it to a release yet?

[cool-RR]

@Gusted @alexanderby Got time to answer my questions above?

[Gusted]

We didn't touched PDF make sure you have permission for file:// enabled

[cool-RR]

Correct, that was the issue. Thank you!

[zbot473]

Where is the option?
I can't find it on the chrome web store version.

[Gusted]

https://darkreader.org/help/en/#faq ->

The extension doesn't work for local files
Open chrome://extensions page, find Dark Reader, click Allow access to file URLs.

@zbot473

[zbot473]

I can't find the enablePDF option for any pdf files.
Is it part of Filter+ now?

[Gusted]

I can't find the enablePDF option for any pdf files.
Is it part of Filter+ now?

It isn't an option yet, it will be an option with darkreader V5

Open a seperate issue for your question

[zbot473]

Can I just clone the repo and build v5 for myself?

[Gusted]

Can I just clone the repo and build v5 for myself?

Buggy and not fast ATM

[zbot473]

Ok, I'll wait then. Thanks!

[y0rune]

Now it is working in Chrome Browser, but I can not turn it off :(

[Gusted]

Open a seperate issue for your question
@y0rune

[ak0005]

for local pdf in firefox
-> f12>console> viewer.style = 'filter: grayscale(100%) invert(64%) contrast(228%) brightness(80%)'

adjust the numbers according to your preference.

[dn7]

for local pdf in firefox
-> f12>console> viewer.style = 'filter: grayscale(100%) invert(64%) contrast(228%) brightness(80%)'

adjust the numbers according to your preference.

You can even run this with one click by creating a new bookmarklet (bookmark) with the following Location (target):
javascript:void(viewer.style = 'filter: grayscale(0%) invert(100%) contrast(100%) brightness(100%)')

Instructions: create a bookmark in Firefox by pressing CTRL+B > right-click the target folder, e.g. "Bookmarks Menu" > "New Bookmark ...".
Note that colors are also inverted, so blue becomes yellow etc. You can make everything grayscale by setting grayscale to 100%. To undo the darkening simply refresh the page (CTRL+R)

[jirikrepl]

it seems to be working fine on file PDF #374 (comment)

but how to set dark reader to not invert toolbar and sides?
Those 3 rectangles are already dark and should not be inverted.

[Gravifer]

I find from a reddit thread that you could input

document.querySelector('embed').style.filter = 'invert()'

in the browser console to invert the page without affecting the toolbar and the background.
Does this help to find a solution to @jirikrepl's problem?

[jirikrepl]

@Gravifer I disabled dark mode, opened the console, and pasted your code to it.
It inverts the colors on the pdf page. But inverts all - pdf itself, pdf background and top toolbar (like on my previous screenshot)

I see why it will invert all if I select <ebmed>

[Gravifer]

@jirikrepl sorry I didn't clarify the context; I am using Microsoft Edge, and the team modified the viewer plugin. The command actually only inverts the content when the controls are in night mode. Maybe we should hack the plugin already... This is silly.

[TejasO2]

https://darkreader.org/help/en/#faq ->

The extension doesn't work for local files
Open chrome://extensions page, find Dark Reader, click Allow access to file URLs.

@zbot473

Thanks! This worked smoothly!!

[virenchocha]

As per users, PDF are opening in darkmode if accessed on webpage residing on webserver. Why we can't have a local webserver running and read file from it. I've done exactly that and it works. No extra addins. A few mins of work and you have it.

• Have darkreader enabled on Chrome
• Install XAMPP (This will install php, mysql, apache etc.) and it will be rewarding in long run.
• Open XAMPP and start Apache webserver (in case of error of port change port to 8080 in config file of apche)
• Make a folder in already existing 'htdocs' subfolder of XAMPP folder and dump .pdf file you want to read there
• create an index.php file in htdocs and paste following php code.
• In the below code replace filename with file you want to read.
• Remeber index.php and .pdf file you want to read must be in same subfolder of 'htdocs' folder of XAMPP
  `<?php
  // Store the file name into variable.
  $file = './filename.pdf';
  $filename = './filename.pdf';

// Header content type
header('Content-type: application/pdf');
header('Content-Disposition: inline; filename="' . $filename . '"');
header('Content-Transfer-Encoding: binary');
header('Accept-Ranges: bytes');

// Read the file
@readfile($file);
?>`

• Save the file
• type http://localserver:8080.
• Voila ! Your PDF file in dark mode will open
• Feel free to contact or comment.

[JosefLitos]

Despite the PR being merged, I am failing to get dark PDFs in Firefox:

The console command mentioned did work well though, so I assume I must be missing something.
Could anyone direct me where is an option to enable PDFs in firefox?

Edit: I noticed there is a discussion about doqment as a replacement for the default firefox PDF reader with a basic inversion capability.

[luo-chuan]

If you use Firefox, you can edit userContent.css like this:

@media (prefers-color-scheme: dark){
  .pdfViewer{filter: invert(1) hue-rotate(180deg);}
}

If you use Chrome or Edge, install the extention "PDF Reader", then edit the extention option like this:

html[data-theme*="dark"] .pdfViewer{
  filter: invert(1) hue-rotate(180deg);
}