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PDFs seem to keep turning black when a pdf appears on Firefox and Downloads with Firefox. The preview of pages is still intact. Turning off hardware acceleration does not solve the issue. How do I fix this problem?

I want to view USPS PDF labels from their new API. These PDF's are version 1.7. Chrome and Edge all ready work. Will FireFox support this as well ? Viewing one of these PDF's displays a black or white screen.

I would have attached one of the labels so you can see for yourself but you only accept images.

Ask me and I will send you one.

Trying to not just edit a PDF in Firefox on Linux but actually edit the document using its Dynamic-XFA format elements of that PDF. XFA is an Adobe proprietary format that they depreciated several years ago but it still works in Adobe Acrobat Free. (I use a Windows guest VM for this as a workaround for now but I'd rather not since it takes extra resources and time). Elements can be filled in FF and some menu drop downs work in FF but other dynamic XFA element buttons don't respond like the one I attached.

In Acrobat the "X" and "Add Contact" buttons will add or remove some elements to the document.

Can this be done in FF desktop?

Version 151.0.1 (64 bit) on desktop PC.

In about:config I know there are a lot of options to modify under the search term "pdfjs" but I don't know what element would allow this to possibly work if its supported.

I wish I had other better options but government documents are what they are.

Well, there is a bug with your downloading files configurations that REALLY ANNOYS me, which is, i want to always select where to save my downloaded files, no problem with that, i just set all configurations to "always ask", but sometimes, especially for pdfs, i want to just open them, without the need to save them to my computer, so the only one i have set as "open with firefox" is the pdfs, and if i want to download them, i just do so by clicking the download button on the corner. BUT, with this configuration, if there is a button to download a pdf, without opening it previously, it will skip the "ask where to download" pop-up, which is a pain in the ass, as usually want my stuff in specific folders, not the general downloads one. And even iff i set pdfs to "always ask" and then chose to open with firefox, it will automatically download it (???????) to the downloads folder, and then open it from my pc, even tho it could open it from the file in the server, which is what i wanted. I just switched to firefox, please fix this awful feature and dont make me find another browser.

Hi everyone,

I recently started using Firefox on Android to download and print coloring pages for my kids from websites like https://kleurplatenteprinten.nl/ https://kleurplatenteprinten.nl/ , but sometimes the PDF files either open blank, keep loading forever, or do not download properly.

The same files seem to work normally in Chrome, so I’m wondering if this could be related to Firefox settings, built-in PDF handling, or a mobile download permission issue.

I already tried:

Clearing browser cache Switching between Wi-Fi and mobile data Disabling tracking protection for the site

but the issue still happens occasionally.

Has anyone experienced similar problems with printable PDF pages or downloads in Firefox mobile? Any suggestions would be appreciated.

When I try to select some object on a pdf page, a little window appears with "select" and "comment", and the window blocks other objects of the page. How to remove that forever? That is very inconvenient.

When viewing a PDF in Firefox the URL bar indicates the file was downloaded to a temporary folder. If I then select "Save" from the PDF toolbar; or if I right click and select "Save page as" it opens a save dialog to the location I previously saved the same category of PDF to. For example I have separate folders for invoices, if the PDF is my electricity invoice it somehow knows and opens the electricity folder. If it is a water invoice, it automatically opens the water folder.

Whilst this is indeed quite handy, I do not understand how Firefox is doing this; nor do I understand whether this may be a privacy risk in some circumstances and should therefore be configurable.

The attached shows the cursor only from today and free hand highlight from a March 2026 when working properly. The free hand highlight today does not highlight, only the cursor highlight is functioning.

Download Issues My downloads have stopped displaying. Each page of a download is now just a black screen. Any advice as to how I can restore them?

In the past, I was able to freehand highlight PDFs that did not recognize the Text. I was using this function this week; maybe the newest Firefox update is at fault. Without this, half of my documents are not really usable in Firefox. Everything else works. If it recognizes the text, I have no problems; the pencil tool also works just fine.

Hello,

I can't use the built in Highlighter anymore on locally saved PDFs. It only works on PDFs that are properly scanned in and where i can actually select the words. 2 days ago, I was still able to basically use the highlighter on all PDFs and draw on them however I liked. I haven't installed anything new or changed anything.

I also have tried to reset Firefox and reinstalled it. It's still not working.

I would really appreciate any help. I couldn't find anything based on my problems.