Firefox Community Forum

I go to various websites, in this case https://go.valcom.com/EZ-GW1Rezipinstallationmanual (as well as other pages on this same site) and when I try to look at a manual or specs in pdf format, I get a blank screen and the URL looks like the go. and everything after the .com are grayed out. These work fine in Edge and Chrome. This also happens in Troubleshoot mode. No hardware or software changes on my desktop.

I am currently revising for professional qualifications and the PDF study manual I am using is extremely large.

I have seen tutors be able to use the document outline on the left sidebar to be able to filter through different chapters.

However, I do not have that option - I only have the option to view page-by-page which is not very helpful.

How can I get the document outline to show a chapter-by-chapter outline?

Hi,

I'm wondering if fonts installed locally on Windows/PC can be supported in Firefox PDF Editor any time in the future? If you add this feature, it can bring huge productivity boost to us, the Firefox users. Just wondering if there is any development (or even a consideration) on this.

Best,

Anytime that I open a pdf using firefox the page will load but will just leave a blank page with nothing displayed. Reloading does not help and I have tried to change my settings around to no avail

Hi Mozilla Support Community,

I use Firefox Desktop as my primary browser for running a corporate consultancy agency. Recently, I've noticed an issue with Firefox's built-in PDF reader (pdf.js) on certain official interactive forms.

When downloading, previewing, and filling out business registration forms, MOA templates, or tax certificates from corporate web portals (such as the SECP Portal Pakistan for company name search and FBR verification tools), certain custom font fields in the PDF appear overlapped or fail to display input text properly.

System Details:

Firefox Version: Latest Desktop Release (Windows 11) Issue: Form text fields in interactive PDFs fail to render non-standard font glyphs properly. I wanted to ask:

Is there a specific preference in about:config to force Firefox's PDF.js viewer to fallback to system fonts for interactive form fields? Is there a way to reset pdf.js rendering cache without clearing general site cookies and sessions for web applications? Any troubleshooting tips or about:config tweaks would be greatly appreciated. Thanks! https://secpportal.com.pk/

I use Firefox as my default program for opening PDFs. But if I try to open more than one at the same time it will always leave one out and instead open a "New Tab" that I don't need. Can't figure out why or how to fix it.

Example: If I check (windows 11) files A, B, C, D, and E. It will open A, B, D, & E and a "New Tab" and leave out C.

Any Solutions?

I recently noticed that EVERY pdf I open for reading is being saved in my computer's Downloads folder! DESPITE my Settings "Ask where to save files before downloading" and "Ask to open or save files." I am enrolled in an online certification program: There is LOTS of reading. LOTS of information being shared through the class portal. I just discovered this mess a couple of weeks ago.

Today, I added a check mark to Other Files under Settings: "Delete private window downloads on close." I'm hoping this will resolve the problem. Am I missing something??? WHY is my longtime browser doing me like this?

FYI: I'm using the Windows 11 OS on my six-year-old laptop. My Firefox (152.0.5) stays current.

Once comments are added to a .pdf in Firefox, how can the comments be saved? The highlights show up in downloaded.pdf but when opened again in Firefox, the comments are gone. I want tosave the edited [with comments] document..how can I do that?

How to download a pdf without secure download ? I thought windows defender was the problem, but I can download a pdf without cleaning it with chrome.

My tax return declaration is made using a spreadsheet like pdf document, and when downloading it with firefox, the cleaned document cannot be filled in.

When viewing pdf files created from MS Word (.docx) documents and sent to me I see white lines across some images but not all. This happens with Firefox on Windows 11 and linux mint (various versions). It is present on the images from the file as received and after uploading to a website. The images are OK if viewed using Opera or other browsers but the same problem is present on Thunderbird. The file below has the problem on 2 images when viewed on Firefox. https://www.kass.org.uk/Documents/NewsletterFrom251114/20260304%20March%20Newsletter.pdf I have caused the writer of the article a lot of trouble because I blamed her file which seems to be OK. Can you help? Thanks Brian

idk, what i did, but i assume it's most likely user error. but i don't even know where to go from where i'm at.

ok, i'm going to attempt to identify what is happening. [guess] .pdf website previews are messing up the font when converting the .pdf to an image asset for the website to use as a current web asset, when the .pdf is updated. (makes sense really, smart drag & drop update of a .pdf menu, has instruction to make the end users browser do the work for you. kind of a one and done webpage coding for older guys that can't type, let alone edit Html, or even use Wix. some people just don't "compute" hard R or not. lol )

i don't even know where to start. i mean Mozilla is probably referencing it's own "lib.moz" which is just probably it's own personal link to an existing Lib file so it can pull it in and do what it needs to do with it without Root etc.

that is probably working fine as it renders (opens) the .pdf fine whence it's downloaded it. so all that i've talked about might not be the problem.

there is probably some mozilla function calling that to convert the .pdf as an image web asset so that it can show a preview of the current .pdf available for download.

that converter is messing up the font recognition, and building a preview image with messed up font characters (why it looks like Wing-Dings). but i don't even know where to start, and i don't think a new install will solve this (kinda overkill, and any residual files may still remain.)

i'm adding a fastfetch

─────────────────────────────────────────────────────────────────────
BIOS (UEFI)          F20 (4.6)
Board                X79-UD3 (1.1)
─────────────────────────────────────────────────────────────────────
CPU                  Intel(R) Core(TM) i7-3820 (8) @ 3.80 GHz
CPU Cache (L1)       4x32.00 KiB (D), 4x32.00 KiB (I)
CPU Cache (L2)       4x256.00 KiB (U)
CPU Cache (L3)       10.00 MiB (U)
─────────────────────────────────────────────────────────────────────
GPU                  NVIDIA GeForce GTX 1660 SUPER [Discrete]
Vulkan               1.4.341 - NVIDIA [610.43.02]
OpenCL               3.0 CUDA 13.3.44
OpenGL               4.6.0 NVIDIA 610.43.02
─────────────────────────────────────────────────────────────────────
Display (VG248)      1920x1080 @ 1.5x in 24", 60 Hz [External] *
Display (VG248)      1920x1080 @ 1.5x in 24", 60 Hz [External]
Display (TOSHIBA-TV) 1920x1080 @ 1.5x in 72", 60 Hz [External]
─────────────────────────────────────────────────────────────────────
Memory               9.66 GiB / 31.26 GiB (31%)
Swap                 12.00 KiB / 1.91 GiB (0%)
Disk (/)             675.49 GiB / 7.22 TiB (9%) - ext4
─────────────────────────────────────────────────────────────────────
OS                   Linux Mint 22.3 x86_64
OS Age               99 days
Uptime               5 days, 2 hours, 40 mins
Packages             2452 (dpkg), 18 (flatpak)
─────────────────────────────────────────────────────────────────────
Kernel               Linux 6.17.0-35-generic
Bootmgr              Ubuntu - shimx64.efi
gcc                  13.3.0
Init System          systemd 255.4-1ubuntu8.16
Shell                bash 5.2.21
LM                   lightdm-autologin 1.30.0 (X11)
DE                   Cinnamon 6.6.7
WM                   Muffin (X11)
Terminal             GNOME Terminal 3.52.0
Terminal Font        MesloLGS Nerd Font Mono (12pt)
─────────────────────────────────────────────────────────────────────

Mozilla Firefox 152.0.1 " updates are manage by your operating system."

re-posted from; [[Why is Firefox PDF printing so strange?|https://support.mozilla.org/en-US/questions/1275786#answer-1276068]] and edited: reasons; support ticket gudelines [[Posting support requests|https://support.mozilla.org/en-US/kb/mozilla-support-rules-guidelines#w_subjects-covered-in-the-support-forum]]

[[i somewhat found an "answer" though i'd hardly call that "solved."|https://support.mozilla.org/en-US/questions/1275786#answer-1276068]]

i still say a Lib in a repo needs updated, within, or perhaps up stream of the project to reflect "commonly used fonts" if applicable (i know that's the trick, 'is it FOSS') yet other browsers use it, though idk if they're FOSS... i'd need to know what i'm looking for to confirm that or not, and do something about that (again most likely upstream, as the PDF Viewer is probably it's own project (or even several), retooled by Mozilla for Firefox.

I have looked at some of the comments about Firefox automatically opening pdf docs. Myu concern is twofold. Most importantly the password in the doc is somehow being overriden; that is a severe security issuen for me. Destroys the whole concept of security. Makes me very uncomfortable and may discontnue using Forefox after more than 15 years. Secondly this caught me by surprise; it only occurred for the first time this morning. How can i overcome this to prevent Firefox from performing merely as a browser?

I clicked on a PDF website while searching for articles on relations between Ukrainian settlers and First Nations people. Instead of opening so I could read it, it was automatically downloaded as a file into Firefox. Unfortunately, I noticed the title had random parentheses in AFTER I clicked on it to read it. I updated Windows defender, and ran the offline scan. I also uploaded and ran MSN.com M.S.R.T. and Malware Bytes, but they found nothing.

What happened? Did I unwittingly install Russian malware into my computer, or does Fire Fox automatically download some PDF websites as files?

Thanks,

Charlotte

When filling in the PDF documents, at each section/line I move too, the font reverts back to the super large size, without being prompted too. Is there a way to set the font, so it remains the same, unless prompted? When attempting to adjust the font, it goes from super large to super small, any suggestions to set the font in between these two sizes?

• • I opened up the document from my email and began working from there. Should I use a PDF program and not from the email?**

Since this morning, Firefox previews any PDF I click on, and then I have to manually download it for it to open in Acrobat. Acrobat is set as my system default. I have tried other suggestions found here, such as going into the troubleshooting and checking the folder profile, but nothing works. It is very frustrating.

Since the update to Firefox a few days ago, I am no longer able to view PDFs in the browser. They still open, but they show up as blank pages. Is there a way to fix this or to revert back to the previous version of FF?

Thanks.

I'm filling out an appcation for a study permit in canada. My university website said that i should download adobe acrobat reader and use it to open the application pdf. I didn't want to pay for adobe, so i opened it with firefox instead. In the document, there are tab selections that it allows so you can select answers accurate to you and fill out the document. But at the top of the document it says I should enable javascript by going to preferences, then edit, and and then reopen the form. How can I enable javascript in firefox? I'm having difficulty finding the preferences and edit sections.