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Hello. I have a question. When I scan a PDF file in Firefox, it opens in a new window. Why? I don't mind it opening in a new tab, so I would prefer it to open in a tab.

Hi everyone,

After enabling `privacy.resistFingerprinting = true` in `about:config`, I noticed that Firefox’s built-in PDF viewer (`pdf.js`) is always displayed in **light mode**, even though my system and browser themes are both dark.

I understand that RFP forces `prefers-color-scheme: light` to prevent fingerprinting, but this also affects internal components like the PDF reader. Unfortunately, the PDF viewer doesn’t provide a manual dark mode toggle.

Is there any **official or safe workaround** that allows keeping RFP enabled while still having the PDF viewer use dark colors?

Thanks!

Hi all, I remember in older versions of Firefox (within the past 6 months) that pdfs embedded in a page would be a hyperlink that you had to click which would open in another tab. Now pdfs automatically open which is very annoying as it makes it difficult to read, while I found a way to open it in another tab I was wondering if there is a setting I can disable so I can just click on a hyperlink.

Thanks in advance

Using Firefox 143.0 on Ubuntu 24.04, when loading PDFs into the browser window, the PDF does not get properly rendered. Instead, when scrolling part or all of the PDF just show the desktop or windows behind Firefox. This usually happens after opening several PDFs and then keeps happening until I restart Firefox. Is there an issue for this extremely annoying bug?

On one PC, pdf files [Type of file : Firefox PDF Document (.pdf)] display with a PDF icon but on a second PC, pdf files [Type of file: PDF File (.pdf)] display with a Firefox icon.

What changes are needed to have pdf files display with a PDF icon on the second PC?

I have a pdf document with live hyperlinks to websites. However, when I click on them, they open in Edge and not my default browser Firefox. Any suggestions? Have set default browser to Firefox and default PDF to Acrobat reader.

I have searched for an answer to my question, but I can't find one. I have checked the settings in about:config to make sure PDF editing is enabled, and made sure pdfjs.enableHighlightEditor is set to true, and pdfjs.annotationEditorMode is set to 0, but the edit options, like adding a signature, drawing, adding images and adding text are all still grayed out. I'm trying to sign a form, and it's annoying to have to print it out to sign it and then scan and upload it again. I even changed the PDF editing permission to "true" in about:config, thinking that might fix it, but it didn't change anything. I don't understand why nothing is working.

''''bold text''''i m trynna use some fillable pdf file forms and am having issues with my information i enter in the required boxes provide in the form like my name my project name my address all the boxes remain where i ca see the form is completely frilled ouit by looking and reviewing the form before i submit it and everything is there i save the filled pdf form to a folder in my downloads igive it the proper name and it saves in my downloads folder with that name and the i go to submit that what i thought was a completed application comes back needing the stuff, the info i already enterred and when i double checkn i open the file to inspect it and there the entries i typed were .......................gone. vanished, fell out eaten by some really wierd something that can sneak in and snatch the entries away without nleaving so much as a puntuation mark no footprint no cache files not evidence of a malicious app thinking its funny tio watcjh me struggle with this all niote it s like my input field boxes are filled with bleach and just making invisible ink or therte is teflon anti stick surface letter repellant in my browserse settings that need to be flipped to something i mean they are 100% being visiuble when forms are filled out but when saving forms to store in downloads folder for transfer to a websites drag and drop box the boxes its like its not allowing scripts or theres a privacy blocker in the browsers background flipped to not allow pasted script or something you have got to have s-9-headssdriiusu\ing th

I am a Dropbox user. I have until recently been almost strictly a Google Chrome user. The PDF seamless behavior I have been seeing in Chrome is like this: 1. If I click on a search engine result for a PDF, I see the PDF opened in the browser. 2. If I click on Download at Dropbox, the PDF is downloaded to my PC.

On installing Firefox, the behavior I saw was like this: Whether I clicked on a search engine result or Download at Dropbox, I saw the PDF opened in my browser.

When I changed the Action for Portable Document Format (PDF) (application/pdf) and Portable Document Format (PDF) (application/binary)to "Save File", the PDF downloaded to my PC. But so did search engine links.

I seem to have fixed the issue by making my settings like this: 1. Action for Portable Document Format (PDF) (application/binary) to "Save File" 2. Action for Portable Document Format (PDF) (application/pdf) to "Open in Firefox"

Fingers crossed. ??? I was wondering why it wasn't set up this way on installation.

I am a magazine editor right on deadline and as my Firefox inisted it must be updated I endeavoured to do so and now it will nor allow me to open up and forward any pdfs.Please help.

I'm trying to write a date (specifically tomorrow's) in a PDF. Whenever I enter it, I get this error message telling me to use the wrong date format. Why does my browser have the authority to override my decisions in this way?