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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… (funda kabanzi)

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 9 izinyanga ezidlule

Answered by cor-el 9 izinyanga ezidlule

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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… (funda kabanzi)

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 unyaka odlule

Answered by Vaghar 1 unyaka odlule

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Firefox Automatically Redirecting from HTTP to HTTPS (RESOLUTION)

As per this issue I reported a while back, I was experiencing odd issue with automatic redirect to HTTPS for some private development sites. I finally found a fix for th… (funda kabanzi)

As per this issue I reported a while back, I was experiencing odd issue with automatic redirect to HTTPS for some private development sites.

I finally found a fix for the issue. The problem appears to be with DuckDuckGo Privacy Essentials Extension which apparently *may automatically redirect to the http site. In order to prevent this, I added my development sites to 'Unprotected Sites' and this prevented DuckDuckGo from doing the automatic redirect to https.

  • - Odd thing is that I had multiple domains pointing to the same web instance and only one of the domains was having this issue with the DDG extension. Both were going to the same IP through a HTTP proxy. The proxy and web server were not the issue. This symptom points to an maybe an issue in Firefox....

In summary, be wary of odd redirects and the DuckDuckGo Privacy Essentials extension if you are doing web development work.

Asked by Timothy C. Quinn 1 unyaka odlule

Answered by Timothy C. Quinn 1 unyaka odlule

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download popup not opening when clicked

Hello! Sometimes when I download something, when I click on the download icon in the toolbar, the download popup doesn't appear. I can fix this by restarting firefox or o… (funda kabanzi)

Hello! Sometimes when I download something, when I click on the download icon in the toolbar, the download popup doesn't appear. I can fix this by restarting firefox or opening a new window. Why does this happen? I am using Linux Mint Cinnamon 20.3

Asked by -elison- 1 unyaka odlule

Answered by cor-el 1 unyaka odlule

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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 … (funda kabanzi)

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 unyaka odlule

Answered by Kiki 1 unyaka odlule

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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… (funda kabanzi)

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 unyaka odlule

Answered by cor-el 1 unyaka odlule

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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… (funda kabanzi)

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 12 izinyanga ezidlule

Answered by cor-el 12 izinyanga ezidlule

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OpenH264 fails to install with HTTPS-Only mode enabled

"OpenH264 Video Codec provided by Cisco Systems, Inc." plugin will sit in the "will be installed shortly" status forever if you have HTTPS-Only mode enabled. I have been … (funda kabanzi)

"OpenH264 Video Codec provided by Cisco Systems, Inc." plugin will sit in the "will be installed shortly" status forever if you have HTTPS-Only mode enabled. I have been pulling my hair out for the last few days trying to figure out why I couldn't play YouTube or many other sites videos.

Turns out the site that the library is downloaded from has a bad certificate installed: https://ciscobinary.openh264.org/libopenh264-2.3.0-linux64.6.so.bz2

``` Websites prove their identity via certificates. Firefox does not trust this site because it uses a certificate that is not valid for ciscobinary.openh264.org. The certificate is only valid for the following names: a248.e.akamai.net, *.akamaihd-staging.net, *.akamaihd.net, *.akamaized-staging.net, *.akamaized.net

Error code: SSL_ERROR_BAD_CERT_DOMAIN ```

OS: Fedora 36 Firefox Version: 104.0 (64-bit)

Asked by Nickolas Gupton 1 unyaka odlule

Answered by Nickolas Gupton 1 unyaka odlule

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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… (funda kabanzi)

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 unyaka odlule

Answered by Local_Minimum 1 unyaka odlule

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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… (funda kabanzi)

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 unyaka odlule

Answered by jonzn4SUSE 1 unyaka odlule

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File input is not working at all

In my firefox the file input is not functioning at all. EX: I go to https://www.w3schools.com/tags/tryit.asp?filename=tryhtml5_input_type_file and try and use any of the… (funda kabanzi)

In my firefox the file input is not functioning at all.

EX: I go to https://www.w3schools.com/tags/tryit.asp?filename=tryhtml5_input_type_file and try and use any of the file inputs there - they just do nothing.

Same with the file inputs on this support form page. None of them work for me.

System - ubuntu22.04, ff: 106.0.1 64bit

Asked by alan.kesselmann 1 unyaka odlule

Answered by cor-el 1 unyaka odlule

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Google sign in pop-up.

Does anyone know how to configure Firefox to stop the annoying google log-in pop-up? I've seen others ask the same question, but I have not seen any functional answers. … (funda kabanzi)

Does anyone know how to configure Firefox to stop the annoying google log-in pop-up? I've seen others ask the same question, but I have not seen any functional answers. I've never had a google account, for anything. I don't get the pop-up with other browsers, like Falcon or Brave. It's just a problem on Firefox. I appreciate you help!

Asked by njbetavirp1 1 unyaka odlule

Answered by njbetavirp1 1 unyaka odlule

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I am running Firefox on Ubuntu 22.04 and it constantly crashes. Trying to determine what is causing this.

I have a new installation of Ubuntu 22.04 on my 2015 Lenovo IdeaPad 300. I have a new SSD HD 1 TB in size and it should work, however, Firefox keeps crashing. Other app… (funda kabanzi)

I have a new installation of Ubuntu 22.04 on my 2015 Lenovo IdeaPad 300. I have a new SSD HD 1 TB in size and it should work, however, Firefox keeps crashing. Other apps are crashing too.

Asked by Daniel Grindstaff 5 izinyanga ezidlule

Answered by Daniel Grindstaff 5 izinyanga ezidlule

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Password generator does not appear on some sites firefox

Idk why but sometimes firefox just doesn't prompt to generate secure password, I even have to download some extensions to generate secure password (Secure Password Genera… (funda kabanzi)

Idk why but sometimes firefox just doesn't prompt to generate secure password, I even have to download some extensions to generate secure password (Secure Password Generator) meaning more secure issues.

My guess is that you guys probably hardcoded something like {if "type: password" then prompt}, but it's still partly fault at developers too for bringing these huge chunks of javascript.

In screenshot there's element examaple in which i input password but no prompt whatsoever.

Asked by astyd637 1 unyaka odlule

Answered by astyd637 1 unyaka odlule

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How can I set a custom file as home page for new tabs in Firefox Desktop 107?

Hello, in past versions of Firefox, I was able to follow the steps on this page to set a custom HTML file on my PC as my home page for new tabs: https://peterries.net/blo… (funda kabanzi)

Hello, in past versions of Firefox, I was able to follow the steps on this page to set a custom HTML file on my PC as my home page for new tabs: https://peterries.net/blog/firefox-ubuntu-local-file/

I have Firefox 107.0.1 now and it's not happening. When I open the browser from scratch, I see my custom home page file. But when I open a new tab, I just see a blank screen. If I then click the Home icon on the toolbar, I do see my custom HTML page, but I don't want to have to click that button for each new tab.

Right now, in my settings, I have the URL to the page set as the custom URL for the HTML fiile, like this:

file:///home/peter/Documents/homepage/peter-home-homepage.html

That works. And I also have followed the steps on that blog post to customize my /usr/lib/firefox/autoconfig.cfg and my ../firefox/defalults/pref/autoconfig.js files. That's no longer working.

Did something in a recent version change? Is this no longer supported? Thanks for any ideas!

Asked by peterr2 1 unyaka odlule

Answered by cor-el 1 unyaka odlule

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Impossible to use an unusual port number in local URL

Hi all :) From a fresh Linux Debian Bullseye I try to connect to a local machine with Firefox (v97 64-bits) by its hostname (avahi server with default domain "local… (funda kabanzi)

Hi all :)

From a fresh Linux Debian Bullseye I try to connect to a local machine with Firefox (v97 64-bits) by its hostname (avahi server with default domain "local") with the port 6180 bound to a remote web service port (61 is the distant machine IP and 80 is the forwarded port).

When I want to open this URL : http://bionic.local:6180/ FF displays "We can't find this site ... Unable to connect to server at bionic.local ... check your network connection and firewall"

BUT ping bionic.local works perfectly and resolve the good IP address from the Chromium navigator the same URL works without a problem, I can open the distant web site.

This workaround works : add a static resolution in the /etc/hosts file : 192.168.0.71 bionic bionic.local => so FF works in the expected way for now ! But as I said this a workaround and a bad solution.

I supposed too the port was blocked because I accessed an unusual port. So I tried this without success.

How the hell make that FF v97 allows me to use an unusual port ? Or is it bound to the domain "local" which is no more accepted by FF ?

Thank you in advance for your help. With adelphity, lnj

How to do

Asked by estebann 1 unyaka odlule

Answered by estebann 1 unyaka odlule

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Starting Firefox on remote machine runs local version

I have several machines on my local network. I work on machine A, and run applications remotely using ssh -X on the other machines. Today I discovered that when I start… (funda kabanzi)

I have several machines on my local network. I work on machine A, and run applications remotely using ssh -X on the other machines. Today I discovered that when I start Firefox on newly-upgraded machine B, it's actually starting the older version that's on machine A. This seems obviously wrong, and is certainly not what I want to happen. I want to run the newer Firefox that's on B, and have it display on A.

Longer details: A runs OpenSUSE Leap 15.0. B runs Leap 15.4. I start an xterm on B with the command " "ssh -X -l me B", and programs other than Firefox I run from that xterm display on A's monitors, as expected. However, when I try to run Firefox (by typing "firefox &" on the command line, what actually runs is the older version of Firefox that is on A, just as if I'd started it with the same command on one of A's terminals.

Is this a known behavior, and if so, is there a way to work around it? Or am I just doing something really stupid?

Asked by jamesqf 1 unyaka odlule

Answered by jonzn4SUSE 1 unyaka odlule

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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… (funda kabanzi)

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 unyaka odlule

Answered by cor-el 1 unyaka odlule

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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… (funda kabanzi)

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 unyaka odlule

Answered by cor-el 1 unyaka odlule