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Firefox's PDF viewer incorrectly applies user-defined font settings intended for HTML pages, resulting in illegible PDFs and requiring time-consuming workarounds.

Key Points: 1. When "Allow pages to choose their own fonts" is disabled in Firefox settings, the built-in PDF viewer renders some PDFs with incorrect fonts, replacing characters with icons and gifs. 2. This setting should only affect HTML pages, not PDFs, as PDFs are designed to maintain the author's exact formatting. 3. Current workarounds (saving/opening PDFs locally or toggling the font settings) are inconvenient and disrupt workflow. (Open a settings tab, navigate to fonts, navigate to advanced, toggle the option, select okay, return to prior tab, reload, view without error, then repeat the process to restore preferred settings.) 4. Users who prefer custom fonts for HTML content are forced to choose between readable PDFs and their preferred web browsing experience.

Background: HTML is intended to decompose information exchange in such a way that the viewer has control of aspects such as fonts; while PDF is a format designed specifically to present exactly as the author intended. The difference is the primary reason an author would choose to use pdf vs html. The issues can be reproduced with B612 and other fonts, in Firefox 127.0.2 and many earlier versions, on github repositories pages that embed pdf files, and most other pdf files opened with the viewer.

Proposed Solution: Implement a separate font control setting for the PDF viewer, allowing users to maintain their custom font preferences for HTML content while correctly rendering PDFs with the author's intended fonts. Or, simply disallow the setting to apply to the PDF Viewer.

Impact: Resolving this issue will significantly improve user experience, maintain the integrity of PDF documents, and eliminate the need for disruptive workarounds, ultimately enhancing productivity for affected users.

Hi there! After a short elektricity blackout my PC was rebooted and I lost functionality of shortcuts on Mozilla default home page, turning on or off this shortcuts leads nowhere and just move search bar.

TeamVIEWER icon showed up on laptop this morning - my regular Mac desktop screen missing, figured out it TV was appearing under Guest User. Then I made error of downloading installer thinking my son was wanting to help me clean up my lap top from afar because I am 80 and get very confused and had asked him for help because I don't understand the tech vocabulary. Anyway, I can't get rid of it. It had someone's PW (hidden) an ID and could be 'remote controlled'. I saw a yellow caution sign appear so I stopped trying to install. but now I get a TEAM VIEWER Package that won't delete or go away.

This is very scary to a senior because EVERYONE is warning us don't click on unknowns. No one has used my laptop. I live alone. It appeared by itself this morning. And it had a Safari icon but I use only Firefox.

Thank you.

I have set Firefox to not automatically restore the previous session on launch. That is, "Open previous windows and tabs" is unchecked in the Startupsettings.

Most of the time it does not do so, however the previous session will get erroneously auto-restored in the folowing circumstances.

Open a few tabs in a normal Firefox window. Fully quit Firefox (via, for example, pressing ctrl+shift+Q). Open a private window first. Open a normal window second.

What should happen is that the new normal window contains just a single new tab. What actually happens is that the tabs that were open in the previous session get auto-restored in this normal window.

To sum up, there is no auto-session restore if Firefox is launched with a normal window first. There is auto-session restore if Firefox is launched with a private window first, and then a normal window is opened second.

Is this a known issue, and are there any known fixes to prevent the auto-session restore in the latter case also?

I've added https://x.com as an exception site but it is still blocked.

This is outright censorship which is something fascists do.

Tell me how to fix your browser so I may access x.com again or I stop using Firefox forever.

Problem: Persistent 150 KB of Cached Web Content For several years, I have gone to “Settings” / “Privacy & Security” / “Cookies and Site Data,” clicked the Clear Data…” button, checked both “Cookies and Site Data,” and “Cached Web Content,” and clicked “Clear”, and consistently gotten BOTH “Cookies and Site Data,” and “Cached Web Content” down to “0” zero. Recently, I have been unable to “Cached Web Content” to go below “150 KB of disk space.”

         I have NOTHING listed in “Manage Cookies and Site Data” or “Exceptions -- Cookies and Site Data.”
         I have tried reinstalling, but the problem has persisted.
         On the assumption that this is malware problem, I have continued to use Mozzella VPN, but stopped using the program for browsing, etc.  Should I stop using it altogether until the problem is fixed?
         Can you tell me how to get rid of the last “150 KB” of “Cached Web Content”?

I have a desktop and a laptop. Desktop crashed, so rebuilding.

Firefox on both, settings same on both. On Desktop - Last Pass will not appear. On laptop, same as it always has been.

Image below from my Desktop without the Last Pass icon there.

I've downloaded the LastPass Extension from Mozilla a couple times.

Help, please.

Very weird.

Firefox keeps going off for from 5 seconds to about 20 seconds. It happens several times a minute. The screen goes blank and I can’t click on anything. Really aggravating. I would appreciate any help. Thanks

Since the penultimate and now the last current update to version 127.0.2 (64Bit), the button (tile with the + sign) to add new shortcuts is no longer available. How can new shortcuts be added now?

Just like title says, there's no download panel when opening a youtube video in a new tab. If i open it in the same tab, it'll show the download panel. How can i fix this?

When trying to load a PFX certificate into the latest version of Firefox on a new Windows 11 computer, the certificate will load just fine but Firefox will not offer prompts for things such as mark the key as exportable or enable strong private key protection. Tried the certificates in chrome and they work just fine.

This causes strong private key protection to be enabled by default and Firefox prompts for the security certificate as it loads each stage of the login screen. You have to select the certificate at least six times before you can get to a screen where you can enter your password for the site, and then you constantly have to select the certificate for every function of the web site thereafter.

Any work around for this?

This is getting frustrating beyond belief. Buying things online is one the the basic activities anyone does using a browser these days, yet I am increasingly finding myself unable to do so.

It's a particular concern because, like many others, I am disabled and depend on the internet for the delivery of essential goods and services.

This problem for me began a few years ago with the Cashflows payment service that many retailers use. The card details entry page would never load up and consequently no payment could be attempted, nevermind passing through the security checks after this. Earlier this year or so, Firefox updated itself and seemingly fixed the problem.

Today, I again have problems with Firefox and Cashflows-enabled websites. I also have problems with VivaWallet-enabled sites now too, and one other that I presently forget the name of. Possibly also Apple's website, but I'm not too sure about this. Taking the browser right down to base settings with no extensions etc, a fresh clean install even, does nothing to resolve it.

The workaround seems to be use a Chrome-based browser instead, undermining the privacy and security advantages of Firefox, although this doesn't always work in all cases. I also find this less accessible as a disabled user, not that Firefox doesn't still have a long way to go towards accessibility - it certainly does, especially since it dispensed with the Nuance extension for Dragon.

Is Firefox intending to shoot itself in the proverbial foot? Because I don't think it will have much of a future if it can't at least get this bit right, for all the security and privacy advantages it cares to boast about.

It's an infuriating and distressing issue. As I encounter more payment issues, I begin to wonder how much more my world could close in on me. Imagine if all the other browsers started behaving this way too? It's a scary thought.

Please, Firefox, make this issue the priority it deserves to be. You can have all the security and privacy bells you like, but a browser that is otherwise dysfunctional is no good to anyone.

Generally the video source either YT or twitch should only play/resume when that tab is in focus. however since the latest update its being doing it even when firefox is not focused and I am working on something else.

Hi, I recently opened an account on my iMac with a news media provider. I opted for the Mozilla-generated email mask and securely-generated password. In both cases the mask and password consist of a very long sequence of randomly generated characters. Just wondered if there is an easy way to log in to apps on iphone without having to copy out a long sequence of characters for both email mask and password? Using latest version Sonoma 14.5. iPhone 15 iOS 17.5.1.

My New Tab page has four rows of shortcut tiles, 8 to each row. Total= 32 tiles. I accidentally "dismissed" one tile and now the page has only 31 tiles. I can find no way to restore the setting for 32 tiles. I looked in the "about:config" file but cannot figure it out. Kindly help. Thank you.

Hello, Since yesterday, the Firefox web browser crashes systematically. This has happened well over a dozen times. I've tried multiple step-by-step solutions: deactivating extensions, troubleshooting mode, repairing firefox, uninstalling and installing Firefox, trying several versions of Firefox (Quantum, ESR, Nightly), downgrading to an earlier version, uninstalling and completely cleaning Mozilla folders on AppData, deactivating graphics/hardware acceleration...

At one point, Firefox was crashing after ten seconds of watching a video on Youtube or another platform. After reinstallation, video playback no longer causes the browser to crash, but closing a tab does.

I am currently using Mozilla ESR 115.12.0. After reinstalling, I lost all the reports I sent. Nevertheless, I was able to reproduce the crash to give you the ID: [https://crash-stats.mozilla.org/repor.../a2d0f5de-d03f-450b-88f8-a8fdc0240705] Another crash report : [https://crash-stats.mozilla.org/repor.../71c602f6-c682-4158-9880-24d6a0240705]

According to the crash table, the reason for the crash is as follows: EXCEPTION_STACK_BUFFER_OVERRUN / FAST_FAIL_GUARD_ICALL_CHECK_FAILURE This reason appears on all crashes.

Thank you.

In recent Firefox versions, long container names are trimmed to around fifteen letters. Is there a way to disable this feature?

Since containers are named by the same user as the browser, people who want shorter names will name shorter ones by themselves. I wonder who wants this feature.

Version: 127.0.2

Hi,

When I seek in videos, for example on youtube, it almost always hangs the entire machine. The same issue happens randomly as videos run, eg after about 5-7 minutes.

I'm struggling to get more information on what is happening (eg logs) because the whole system hangs.

Here are some things I have discovered:

1. I can reproduce in a fresh profile 2. I can reproduce with the flatpak version 3. I can't reproduce in the Brave browser 4. I can't reproduce the problem on Windows, only on this Linux machine

I'm running on Linux (debian bookworm). I'm using wayland. I have an intel i915 GPU (Alder Lake).

The problem started recently (last few days), but I'm not able to nail down exactly what changed.

What I really want is any way to get more information about what is happening - logs or debug output or whatever. Then I can work out if the bug is in Firefox, or something else on my system (eg intel graphics drivers)

Thanks, Cal