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Opening PDFs automatically with Firefox and, without any changes I might make, saving them with the download function in Firefox, actually ruins the functionality and data entry function of that file. Specifically this happens with PDF files downloaded from the (not all that amusing) PDFs from the FINCEN, (US Financial Crimes Enforcement Network). I do not see why and how Firefox thinks it is allowed to change files that are simply downloaded and saved on Firefox.

In other words, it seems that Firefox strips away certain "permissions" and/or "functions" (like built-in lookup, menu or choice boxes). This means that the file so downloaded via Firefox can no longer be used to properly fill in data, or to look up and choose data items within the file. (I see many times that ANYTHING having to do with "permissions" tends to be an intractable and unsolvable problem for software makers & experts, so, if you do not know right away how to solve the problem, it will probably take you several years to figure this out.)

The PDF in question is created by a government agency. If you have ever dealt with a government agency, then you know that they act sort of like Adobe or Microsoft: "They don't respond, or they do respond & say they do not understand, and if they understand, they are either unwilling or unable to fix the problem."

If there is a switch or option within Firefox, which lets me tell Firefox "Save this file exactly like it is received, nothing added or removed!", that would be nice. I just have not found such an option yet, and it would be nice if it might get provided someday.

I will share my browser data, but I am sort of convinced that a detailed question like mine will not be addressed within that shared data.

Version 157.0 (64bit) has updated and resizing has caused issues. Previously, on my laptop screen, when I was viewing pdfs in browser I would navigate to the Tools dropdown and view the document properties at the very bottom of the dropdown. Before the update, all of the menu items fit without needing to scroll (when the window was fullscreen). Now, i must scroll in the dropdown to access Document Properties. The update resized the menu, making it longer and now it overflows. Please consider resizing back to original size or allowing users to adjust the dropdown menu.

The "New" PDF previewer sucks, can we revert to the old one that actually worked ?! It's a "Preview" , maybe don't try to open everything and BE a PDF program inside the browser, the whole point is to get a "Quick" look so you can decide to open , or, delete it ! This is as Bad as MS Edge trying to take over for PDF's , Revert this change, or Give us a way to choose to use the old way ! Thank you.

When I set Firefox as my default pdf viewer and click in Macos Finder to open multiple files nothing happens. Clicking on one file it opens it fine. Used the "Troubleshoot menu" to disable extensions and disable custom settings, same behavior. At one point I disabled "hardware acceleration" and it actually worked. Then it stopped working, not sure why. Any ideas?

Thank you.

Hi. This is more of a bug report than a question, but after new update our company got a big problem: we print from firefox, but we had it set up so as we open the PDF document it would open directly into Adobe Reader (and then print). After update this is no longer available, altough the settings say clearly "open with Adobe/windows application". Is there a possible solution? Thanks for the answer

Meine gespeicherte PDF Dateien lassen sich nicht mehr automatisch mit Firefox öffnen Durch das Umstellen Ihres Firefox lassen sich die am Computer gespeicherten PDF nicht mehr automatisch mit Firefox öffnen. Ich werde jedes Mal gefragt, womit geöffnet werden soll.

I used Quickfile for my accounts. Until the most recent Firefox update, I could create invoices within the software which seems to use Firefox to create them. this no longer works - within firefox it looks like it is creating the file, but doesn't seem to create a file that is able to be opened. Therefore I am using the Print Preview within Firefox, and selecting Print/Save to PDF and this works ok, but is another couple of clicks which is annoying.

Whilst Firefox may not be at fault, the issue isn't there on other browsers and it happened with the big update last week.

Pressing print/pdf button for screenshot then pick the folder destination documents then press save and what it's used for is decrease the size of the screenshot with pinching the screen then retake the screenshot of desired smaller size however for the first time it has an error in documents folder the says "can't open pdf" and then I tried the 3 dot menu in upper right corner to use an app to open it up and I went through all of them and nothing works

I want to report that after the most recent update (156.0) pdf documents with form fields with data in those fields does not display correctly, the forms look blank.

Hi, Firefox is hard to use for me right now. The screen turns sometimes black while using the browser. Especially when opening pdf documents in Firefox the screen turns black before the document opens. Also, after switching to another tab or App the pdf is not visible anymore and also black (see sreenshot). I have tried reinstalling Firefox and also start in troubleshoot mode. What is the issue??

Thanks.

Sebastian

I am experiencing an issue with Firefox where the Print Preview window automatically opens whenever I open my PPT/PDF file in Firefox.

As shown in the attached screenshot, Firefox immediately displays the Print panel instead of simply opening the document for viewing. I have to manually click Cancel or press Esc every time.

I did not intentionally select the Print option, and I would like Firefox to open the document normally without automatically launching Print Preview.

Could you please investigate this issue and let me know how I can prevent the Print Preview window from opening automatically?

Latest version of Firefox Windows 11 26H5

Why isn't this happening when I open PDF files? Usually, there's an option that lets me choose between opening it directly in Firefox or using my PC's default app (Foxit Reader), but it keeps opening directly in Firefox instead.

When Fidefox updated to 157, it kept all my settings, but it will not allow my windows default PDF viewer to save and open PDFs automatically. Instead, it uses the Firefox PDF viewer - which has improved, but it is not what I would like. I have reset my handlers.json along with trying to force it via about:config. Nothing is working, and it is a hassle.

Starting 2 or 3 days ago, Firefox began displaying PDFs incorrectly. The problem is that a single letter is omitted here and there. In the attached screenshots, the first one shows the word. "Department" with amissing letter "t" in the middle. After refreshing the screen, the PDF displays correctly, as shown in the second screenshot.

This is occurring on a Mac; it does not seem to occur on a Windows desktop machine.

I am running Firefox Desktop 155.1 on MacOS Monterey 12.7.6.