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Firefox flags MP4 file as malware

Hi, Is there any reason firefox would flag an mp4 file legitimately? The file extension and file type are absolutely mp4. There seem to be no mp4 related zero days… (read more)

Hi,

Is there any reason firefox would flag an mp4 file legitimately?

  • The file extension and file type are absolutely mp4.
  • There seem to be no mp4 related zero days.

Does Firefox perhaps just treat all downloads from suspicious domains as malware? Is there a zero day I missed? Is this based on some missing metadata on the file or something?

Thanks for any advice you can give here, I'm scared.

Asked by jordanfilipovski 10 months ago

Answered by cor-el 10 months ago

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Unable to run 'flatpak install firefox' on chromebook

I was following this article https://support.mozilla.org/en-US/kb/run-firefox-chromeos Installed flatpak and repositories but when I try to use flatpak to install firefo… (read more)

I was following this article https://support.mozilla.org/en-US/kb/run-firefox-chromeos

Installed flatpak and repositories but when I try to use flatpak to install firefox I get "No remote refs found similar to ‘firefox’".

I have tried following a few other ways to get it installed, such as using sudo and using sudo su but that has not worked at all.

I followed to flatpak quick setup on Chromebook guide that is linked in the above help article and created the nested containers in crosh as well.

below is what happens if I go to flathub and copy-paste their recommended command to install firefox.

Remote ‘flathub’ found in multiple installations:

  1) system
  2) user

Which do you want to use (0 to abort)? [0-2]: 2 error: Nothing matches org.mozilla.firefox in remote flathub

Asked by Kili Luther 1 year ago

Answered by cor-el 1 year ago

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Import Certificates button not functioning

I am attempting to import server certificates into Firefox. But the "Import" button does nothing when viewing certificates. Any work around? I need to import our serv… (read more)

I am attempting to import server certificates into Firefox. But the "Import" button does nothing when viewing certificates. Any work around? I need to import our server certificates into the Authorities section.

Ubuntu 22.04 Firefox installed through snap. Version 104.0 just upgraded this afternoon.

Thank you, James

Asked by James Finnall 1 year ago

Answered by jscher2000 - Support Volunteer 1 year ago

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Firefox 109.0 on Linux Video Playback

The latest Firefox update appears to break video playback on Linux. I am having issues playing video on Twitter, Facebook, and Locals. YouTube video still plays. I have n… (read more)

The latest Firefox update appears to break video playback on Linux. I am having issues playing video on Twitter, Facebook, and Locals. YouTube video still plays. I have not enabled any new ad blocking and have also not changed any settings. Looking at the Troubleshooting Information in Firefox reveals nothing that is suspect.

Asked by jdawgnoonan 1 year ago

Answered by cor-el 1 year ago

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Some video content can not be displayed.

I use a laptop with Fedora 36 installed. Firefox is version 104.0.1 Until a few days ago, there were no problems with video display. But since a few days, video content … (read more)

I use a laptop with Fedora 36 installed. Firefox is version 104.0.1

Until a few days ago, there were no problems with video display. But since a few days, video content that is offered by the news site from NOS (Dutch television) is not displayed anymore. I only get this error: The media playback was aborted due to a corruption problem or because the media used features your browser did not support.

Also some content on Youtube aborts. For example loading https://www.youtube.com/watch?v=qq0BUiEs3JM results in this error: Er is een fout opgetreden. Probeer het later opnieuw. (Afspeel-ID: Ui0fzPxdSexgYcZ4).' (An error occured, try later again).

When using the Chrome Browser both websites can be used without giving errors implying that all the codecs are available.

How can I detect why video is blocked?

(Twitter also gives problems. After a fraction of a second, it stops displaying video)

Asked by Ben Engbers 1 year ago

Answered by Ben Engbers 1 year ago

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Solved: No Aspect of File Interface works Ubuntu 22.04

I first realized an issue with downloading PDFs through the Firefox viewer - I cannot. The download button does nothing, there is no prompt, no popup, and no file downloa… (read more)

I first realized an issue with downloading PDFs through the Firefox viewer - I cannot. The download button does nothing, there is no prompt, no popup, and no file downloaded. I have also tried to print to pdf, that also seems to fail.

Today I realized I also cannot attach any files to an email through Gmail in Firefox, which is now leading me to believe that the software is unable to interface with my files at all.

Things I've tried include: - Turning off popup blocker - Refreshing Firefox in the ->Help->More Troubleshooting Information Menu - Starting Firefox in safe mode - Reinstalling through snap

The only way I can currently download files is through wget, and the only way I can send attachments is by installing Google Chrome, which is kind of a last resort for me.

I am running Ubuntu 22.04, this is on Firefox 106.0, though it didn't work last update either.

Thanks for any help


Edit: I have been googling for answers but after posting this question a similar thread popped up, the solution is to install the following packages:

xdg-desktop-portal xdg-desktop-portal-gtk

Asked by james228 1 year ago

Answered by cor-el 1 year ago

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Copy-pasting of files not working in Ubuntu 22.04

Hey there, Intro: I recently switched to Linux and (because Brave is so broken) also to Firefox and I am liking it so far. Problem: Unfortunately I can't copy-paste fil… (read more)

Hey there,

Intro: I recently switched to Linux and (because Brave is so broken) also to Firefox and I am liking it so far.

Problem: Unfortunately I can't copy-paste files from Ubuntu Files (Nautilus) to Firefox (I tested image files and also sounds files, neither is working).

Test with Firefox: 1. Download a random photo (e.g. from Unsplash) 2. Select the file and hit ctrl + c in Files/Nautilus 3. I go to the clipboard inspector 4. I hit ctrl + v 5. The image does not show up in the output (see screenshot)

Test with Brave: 1. Do the same as above 2. The image does show up in the output (see screenshot)

Notes: - I am using Linux Ubuntu 22.04 with Wayland - Firefox Version 107.0 (64-bit) for Ubuntu Canonical - 1.0 - I have no extensions installed - I am not using the snap version (so I can scroll smoothly) ... I think I used apt-get install but not 100% sure

Asked by Stephan 1 year ago

Answered by Stephan 1 year ago

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Firefox version 102 removed Edit and Resend Request (Console Tools) - and broke "Resend"

Using Firefox version 102: Open console tools and navigate to Network tab Right click on a POST request "Edit and Resend" is no longer an option? There is still the rese… (read more)

Using Firefox version 102:

Open console tools and navigate to Network tab Right click on a POST request "Edit and Resend" is no longer an option? There is still the resend option Clicking resend allows you to edit the request, but unfortunately the "Content-Length" attribute is not automatically updated like it was with edit and resend, so all requests fail after being edited. This is because the Content-Length header indicates the size of the message body, in bytes, sent to the recipient. When you add or removes bytes in a JSON request for example, it doesn't get updated. The attribute can also not be manually set. How can I use version 102 to edit and resend requests the same way I used to?

Thank you.

Asked by programming_all_night 1 year ago

Answered by TyDraniu 1 year ago

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Firefox and WEBP images

Having just upgraded my Debian 9 machine to Mint 20, this has updated my firefox browser. Everything was going fine until I came across the problem where by all image do… (read more)

Having just upgraded my Debian 9 machine to Mint 20, this has updated my firefox browser.

Everything was going fine until I came across the problem where by all image downloads are saved as webp images, a format that my favourite image editing software cannot handle.

This is a bit of a pain and has made me start looking at alternative web browsers.

Just thought you should know how simple things can cause a loss of support.

Regards David

Asked by david_firefox1 1 year ago

Answered by david_firefox1 1 year ago

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mysignins.microsoft.com

Hello I'm trying to sign into a Microsoft 365 email account but can't get beyond a screen saying "To use this site, you need to change your browser settings to enable DO… (read more)

Hello

I'm trying to sign into a Microsoft 365 email account but can't get beyond a screen saying "To use this site, you need to change your browser settings to enable DOM storage or cookies."

I've enabled DOM storage and cookies but no difference. I've cleared cookies and no help. I'm running Firefox 115.0.2 and Linux Mint.

Is part of the problem that I hate Microsoft and they know it?

Thanks

Asked by arthurjackson 7 months ago

Answered by jonzn4SUSE 7 months ago

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Excessive apparmor log entries on Ubuntu platform

OS version: Ubuntu 22.04.1 LTS (jammy), 64-bit (amd64, x86_64). Firefox version: 110.0 (64-bit) (NOTE: the issue was noticed with version 109.0, too) Firefox package wa… (read more)

OS version: Ubuntu 22.04.1 LTS (jammy), 64-bit (amd64, x86_64). Firefox version: 110.0 (64-bit) (NOTE: the issue was noticed with version 109.0, too)

Firefox package was installed on Ubuntu through 'APT', using the Mozilla Team repository (https://ppa.launchpadcontent.net/mozillateam/ppa/ubuntu/). It caught my attention that an excessive amount of Firefox related 'DENIED' AppArmor log messages is generated during the browser activity.

According to messages, Firefox is occasionally denied read access to '/sys/devices/' area and read/write access to 'oom_score_adj' target in '/proc/'. Could somebody clarify why would that access be required for regular browser operations? I'm a bit puzzled as I haven't noticed anything similar with the older Ubuntu and Firefox versions. A complete suppression of those messages is also an option as long as there's no negative impact on application's performance.

I already posted this question to Ubuntu forum but seems like nobody there could provide an explanation. I'd appreciate any input or hint.

Following is the sample of referred log messages:

---SNIP--- [Fri Feb 24 19:14:50 2023] audit: type=1400 audit(1674000890.813:39): apparmor="DENIED" operation="capable" profile="firefox" pid=2231 comm="firefox" capability=21 capname="sys_admin"

[Fri Feb 24 19:14:50 2023] audit: type=1400 audit(1674000890.877:40): apparmor="DENIED" operation="open" profile="firefox" name="/sys/devices/pci0000:00/0000:00:02.0/revision" pid=2235 comm="firefox" requested_mask="r" denied_mask="r" fsuid=1000 ouid=0

[Fri Feb 24 19:14:50 2023] audit: type=1400 audit(1674000890.877:41): apparmor="DENIED" operation="open" profile="firefox" name="/sys/devices/pci0000:00/0000:00:02.0/config" pid=2235 comm="firefox" requested_mask="r" denied_mask="r" fsuid=1000 ouid=0

[Fri Feb 24 19:14:50 2023] audit: type=1400 audit(1674000890.877:42): apparmor="DENIED" operation="open" profile="firefox" name="/sys/devices/pci0000:00/0000:00:02.0/revision" pid=2235 comm="firefox" requested_mask="r" denied_mask="r" fsuid=1000 ouid=0

[Fri Feb 24 19:14:50 2023] audit: type=1400 audit(1674000890.877:43): apparmor="DENIED" operation="open" profile="firefox" name="/sys/devices/pci0000:00/0000:00:02.0/config" pid=2235 comm="firefox" requested_mask="r" denied_mask="r" fsuid=1000 ouid=0

[Fri Feb 24 19:14:50 2023] audit: type=1400 audit(1674000890.885:44): apparmor="DENIED" operation="open" profile="firefox" name="/sys/devices/pci0000:00/0000:00:02.0/revision" pid=2235 comm="firefox" requested_mask="r" denied_mask="r" fsuid=1000 ouid=0

[Fri Feb 24 19:14:50 2023] audit: type=1400 audit(1674000890.885:45): apparmor="DENIED" operation="open" profile="firefox" name="/sys/devices/pci0000:00/0000:00:02.0/config" pid=2235 comm="firefox" requested_mask="r" denied_mask="r" fsuid=1000 ouid=0

[Fri Feb 24 19:14:50 2023] audit: type=1400 audit(1674000890.885:46): apparmor="DENIED" operation="open" profile="firefox" name="/sys/devices/pci0000:00/0000:00:02.0/revision" pid=2235 comm="firefox" requested_mask="r" denied_mask="r" fsuid=1000 ouid=0

[Fri Feb 24 19:14:50 2023] audit: type=1400 audit(1674000890.885:47): apparmor="DENIED" operation="open" profile="firefox" name="/sys/devices/pci0000:00/0000:00:02.0/config" pid=2235 comm="firefox" requested_mask="r" denied_mask="r" fsuid=1000 ouid=0 . . . . . . [Fri Feb 24 19:16:22 2023] audit: type=1400 audit(1674000983.040:56): apparmor="DENIED" operation="open" profile="firefox" name="/proc/2347/oom_score_adj" pid=2231 comm="firefox" requested_mask="w" denied_mask="w" fsuid=1000 ouid=1000

[Fri Feb 24 19:16:35 2023] audit: type=1400 audit(1674000995.296:57): apparmor="DENIED" operation="open" profile="firefox" name="/proc/2347/oom_score_adj" pid=2231 comm="firefox" requested_mask="w" denied_mask="w" fsuid=1000 ouid=1000

[Fri Feb 24 19:16:39 2023] audit: type=1400 audit(1674000999.280:58): apparmor="DENIED" operation="open" profile="firefox" name="/proc/2347/oom_score_adj" pid=2231 comm="firefox" requested_mask="w" denied_mask="w" fsuid=1000 ouid=1000

[Fri Feb 24 19:16:41 2023] audit: type=1400 audit(1674001001.768:59): apparmor="DENIED" operation="open" profile="firefox" name="/proc/2455/oom_score_adj" pid=2231 comm="firefox" requested_mask="w" denied_mask="w" fsuid=1000 ouid=1000

[Fri Feb 24 19:16:41 2023] audit: type=1400 audit(1674001001.768:60): apparmor="DENIED" operation="open" profile="firefox" name="/proc/2458/oom_score_adj" pid=2231 comm="firefox" requested_mask="w" denied_mask="w" fsuid=1000 ouid=1000 ---SNIP---

Asked by scoobienator 1 year ago

Answered by cor-el 1 year ago

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Unable to show File Picker

This was going to be a question about Firefox being unable to display the file picker dialog, but I managed to find a solution that worked for me along the way. Since it … (read more)

This was going to be a question about Firefox being unable to display the file picker dialog, but I managed to find a solution that worked for me along the way. Since it was nowhere near the top of Google's results, I thought I'll share my solution in the hopes that this would help someone facing this same issue.

The hardware:

  • Asus UM425IA Zenbook (AMD Ryzen 7 4700U CPU)

Worked in:

  • Ubuntu 20.04 LTS
  • Firefox provided by APT repository
  • Xorg display server

Not working in:

  • Ubuntu 22.04 LTS
  • Firefox 99.0.1 provided by snap
  • Wayland display server
  • File picker worked briefly on fresh install, but something (not sure what) quickly breaks file picker functionality

The symptoms:

  • Firefox stopped being able to open file picker dialogs
  • Right clicking an image and selecting "Save Image As..." does nothing
  • With forms that accept file upload (such as on this post question page "Add images (optional):"), clicking "Browse" does nothing
  • File downloads work correctly when set to "Save files to ..." under Settings, but nothing happens when set to "Always ask you where to save files"
  • No response to "Ctrl + O" open file shortcut

Similar questions and solutions:

Things I tried that did not work:

  • Disabling hardware acceleration
  • Starting with add-ons disabled
  • Troubleshoot mode
  • Clearing startup cache
  • Clearing cookies and site data
  • Clearing history
  • Refreshing Firefox
  • Creating and using a new profile
  • Deleting the `xulstore.json` file from the profile directory
  • Toggling all permissions under Ubuntu Settings > Applications > Firefox to off and then back to on
  • chmod 777 ~/Downloads
  • Disabling native file picker "ui.allow_platform_file_picker = false"

And finally, what fixed it for me was to go into "about:config" and change "widget.use-xdg-desktop-portal.file-picker" from "2" to "0". Credit to this post that clued me in.

I really hope this saves someone else 2 days of hair pulling and I would appreciate advice from someone more knowledgeable than me on:

  • Why this fixed the problem
  • Whether I should be opening a bug report either against Firefox, or Ubuntu
  • Whether I should also be changing "widget.use-xdg-desktop-portal.mime-handler" and "widget.use-xdg-desktop-portal.settings", both are currently set to "2"

Asked by James Fu 1 year ago

Answered by Kiki 1 year ago

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Cloudflare challenges only work in incognito (with all extensions)

I've been having an issue for a while now where the cloudflare challenges that ask you to click the check mark to "verify your connection is secure" would just endlessly … (read more)

I've been having an issue for a while now where the cloudflare challenges that ask you to click the check mark to "verify your connection is secure" would just endlessly ask me to click the button and never continue. Sometimes it would say to unblock access to challenges.cloudflare.com.

But if I a launch an incognito window I can visit website with the challenge and it won't even ask! I've added all my extensions to run in incognito mode and everything still works, I can visit the websites in incognito just fine. So the one changing variable is incognito vs non-incognito.

I can have two windows open, one incognito and one not, and browse to the same website and the non-incog window will fail but the incog will just go to the site.

I thought incognito was supposed to only affect the session storage? Does it silently change other things to the running environment of the browser (about:config options, slightly different extension configs)?

Anyone know why this small change would suddenly allow cloudflare challenges to work?

Asked by txrxnet 5 months ago

Answered by txrxnet 5 months ago

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Unable to upload or download files

Hello all, For some reason, I can no longer upload or download files, with the pop-up window failing to appear entirely. I can upload folders through, for example, Dropb… (read more)

Hello all,

For some reason, I can no longer upload or download files, with the pop-up window failing to appear entirely. I can upload folders through, for example, Dropbox or Google Drive, but individual files don't work.

I've reset my browser, uninstalled and reinstalled it, opened it in troubleshooting mode, disabled enhanced tracking protection, but nothing seemed to work. I've tested another browser, and I was able to upload and download files just fine.

Is there anything I can do to fix this? I'm on Ubuntu 22.04 using Firefox 107.0.1.

Asked by Erika Campbell 1 year ago

Answered by jonzn4SUSE 1 year ago

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Export all the bookmarks from a loads of profiles from a script

Hello everyone :) From a folder, I have loads of Firefox profiles from different eras. I am looking for a way to export all the bookmarks of each of the profiles to… (read more)

Hello everyone :)

From a folder, I have loads of Firefox profiles from different eras. I am looking for a way to export all the bookmarks of each of the profiles to an HTML file like the manual method (Library > Import and backup > Export bookmarks to formal HTML), but all in an automatic way by script. I like the HTML export from Firefox because it allows you to quickly navigate using keywords, either in links or in the folder names I gave.

Is there a simple solution that would reuse, for example, the same export code as Firefox ?

Thanks in advance With adelphity estebann

Asked by estebann 1 year ago

Answered by cor-el 1 year ago

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Firefox using FIDO2 Security Keys

Firefox seems to have a problem on Linux using USB Security Keys. I have two Yubico Security Keys which I use for 2FA. The problem seems to be that Firefox cannot communi… (read more)

Firefox seems to have a problem on Linux using USB Security Keys. I have two Yubico Security Keys which I use for 2FA. The problem seems to be that Firefox cannot communicate with the USB port, as it doesn't make any difference whether the USB Security Key is plugged in or not, the error returned is always the same and the Security Key does not light up.

I believe Firefox's WebAuth code must be fine, as it works on Windows, which is why I think it's some kind of permissions problem. Chrome works perfectly with the Security Keys on my computer.

I've used a number of sites (I've listed a couple below) where you can test your Security Key with Firefox on KDE Neon and the error is always "UnknownError: The operation failed for an unknown transient reason":

https://www.token2.com/tools/fido2-test/ https://demo.yubico.com/webauthn-technical/registration

I cannot log into Bugzilla with GitHub as my GitHub login uses a Security Key as the second factor.

Asked by dave353 10 months ago

Answered by cor-el 10 months ago

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wide spacing between words as well as odd-looking numbers in Firefox

Since a recent update the spacing of words in Firefox's UI as well as on some websites seems to be wider than normal (instead of a singular space it seems as if each spac… (read more)

Since a recent update the spacing of words in Firefox's UI as well as on some websites seems to be wider than normal (instead of a singular space it seems as if each space is now a tab wide). Additionally the numbers have also suffered and are now not presented in a normal font anymore but instead seem bigger and grey instead of white or black. Both of these issues occurred at the same time and appear on the normal User Interface of Firefox (e.g. in the bookmarks or in Firefox's settings and preferences) as well as on some websites/search engines. However when copying the text and numbers from Firefox into a regular text editor everything seems normal and no appearance issues can be noticed. What I've already tried: I've restarted my system multiple times since the issue first occurred. I've removed all contents from /home/user/.mozilla/firefox. I've reinstalled Firefox. I've deleted my cache. I've changed my font preferences in Firefox back to Default(Roboto) after having used Inter before. None of my actions above have changed anything. However, when I log into a different user on my computer and open Firefox there everything seems to be normal, so it seems as if this is a user-specific problem.

Thanks in advance, Emma.

OS: opensuseTumbleweed 20220507 Firefox version: 100.0 (issue has occurred since version 98.0)

Asked by emma.6.62607015e-34 1 year ago

Answered by cor-el 1 year ago

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All tabs are crashing and show the message 'Gah. Your tab just crashed'

I am using firefox v104 on linux mint. This problem happened this evening. Every tab i open shows the same error. I tried the solutions suggested in other similar forum… (read more)

I am using firefox v104 on linux mint. This problem happened this evening. Every tab i open shows the same error.

I tried the solutions suggested in other similar forum posts like >safemode (tabs still crashed) >driver update (my drivers are up to date as far i can tell) >deleting cache and reinstalling firefox (tabs crash). I took a backup of my bookmarks and extensions as suggeated in another forum post. > one youtube video (https://youtu.be/F9VaXwSB_po) suggested toggling media.cubeb.sandbox in the config section. The tabs started loading after that but it wasnt that useful as i wasnt able to get any videos to play in the browser.

Also, i don't really know if the issue is related, but chrome tabs were also not loading or responding ('Page unresponsive' error).

Please help. Thank you :)

Asked by Vaghar 1 year ago

Answered by Vaghar 1 year ago

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Dynamic text selection doesn't work

Selecting text on any page, there's no visual feedback of what is selected until mouse is released. There's no feedback that selection starts when mouse button is presse… (read more)

Selecting text on any page, there's no visual feedback of what is selected until mouse is released.

There's no feedback that selection starts when mouse button is pressed down, no visual feedback while moving the mouse with the button pressed and only upon releasing the button do I get to see the selection.

Selecting works fine in other browsers (chromium) and was working the other day before I did a fresh install of Ubuntu 22.04 (was using 20.04 before) wiping my previous Firefox. So this issue is on an almost vanilla Firefox version 104.0.2.

(Incidentally I can highlight that version number and only that version number in the about-box and I get continuous dynamic feedback of what part of the version number I highlight, but nowhere else in Firefox.)

Asked by Local_Minimum 1 year ago

Answered by Local_Minimum 1 year ago