Firefox Community Forum

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.

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.

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?**

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.

Hi All,

I've set Firefox to open PDFs in the default system application (I'm on Linux, KDE, Firefox 146). With previous versions it worked fine. Now, it won't open the file; instead it shows a popup that I have to click to open the file.

Is there a setting I can tweak to get the old behavior back?

Thanks

GI

I frequently use the firefox pdf viewer and greatly appreciate it. However when I use the highlight tool the large popup is distracting and covers up some of the contents on the page. Is it possible to have the tool selected and use it without having the popup being constantly open. See attached image

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

Firefox screws up showing .pdfs. The first view is fine but scrolling seems to overprint the first view without erasing it, if that makes sense, sorta like a double exposure. I can't get a screen cap either, which might just mean it's not a firefox issue at all, but I can view and screen cap .pdfs from any other application. I'm running Debian 12 up to date. When I need to view a .pdf I use Chromium, but I do prefer Firefox.

Firefox 136.0.1, Linux 6.8.0-55, have set Okular as default pdf application, however Firefox will not open pdf file when downloaded nor will it open the file when selecting Open File from the Download Icon on the toolbar. Only was I can get to file is to select Show in Folder option and open from within Dolphin.