Firefox Support Forum

I'm having really odd behavior using Firefox (linux) with Microsoft 365 web apps (outlook, word, excel, etc). Its happening various distros too. Is there a known issue at this time with FF and 365 web apps?

   Excel - cell content deletion on moving through cells.
   Word - line content deletion on hitting carriage return.
   Mail/Cal - Webapp not displaying content on double clicking emails or calendar events.

Found a few sporadic similar reports from users on various forums, but no official note that it was a known bug. Assuming it isn't widespread - anyone here have any anecdotal reports of similar issues. Seems to only affect the linux distro versions of FF.

This renders the web app sites unusable with Firefox so I have had to use another browser for these apps. As these apps are ubiquitous with work and productivity, it's rendering Firefox as a second-choice browser unfortunately. No one really enjoys having to "pick the right browser" for work or play.

Is there any way to resolve these issues? Hoping someone has some insight.

I have a System 76 laptop running Ubuntu 14.04 LTS. The LTS (Long Term Support) ended years ago with Firefox 66. All of that works fine still. My problem is: 1. The world is telling me to upgrade my browser. 2. Mozilla tells me "Note: If you use your Linux distribution's packaged version of Firefox, you will need to wait for an updated package to be released to its package repository. This article only applies if you installed Firefox manually (without using your distribution's package manager)." 3. There will never be an updated package because LTS has ended. 4. IS THERE A WAY TO MANUALLY INSTALL A NEWER BROWSER LIKE FIREFOX 123?

HI! I'm using Firefox 98 on Linux Ubuntu 20.04. after the last update I found several settings changed and I had to reset them, but there is one setting I can't manage. In the download preferences I set all the Microsoft Excel entries to "Always ask", but every time that I try to see an Excel file (no download, just open with ...), this is automatically downloaded. I definitively don't want to download it. How can I change this behavior? P.S.: I realized right now that there is the same problem with .docx files and I don't know how many others file types.

I'm using Firefox Version 98.0.2 on Ubuntu 21.10 with Wayland and Gnome 40.4.0. I choose a larger cursor size from Ubuntu's Settings->Accessibility->Cursor Size. However, in Firefox the cursor always displayed in the smallest size.

Local Machine: Dell Inspiron i5-7200 / 16 GB RAM / Local Op Sys: Ubuntu 20.04LTS

Firefox version: 99.0 FFDE version: 100.0b5

Node.js version 14.18.1 npm version 6.14.15

I had a Node.js web app running on my local machine all usual browsers like Firefox, Firefox Dev Ed (FFDE), Chromium, Edge, Opera, etc till recently.

Recently it shows an error when run on Firefox (also on Chromium, Opera and Edge) although continuing to run okay on FFDE.

Firefox Error: Cross-Origin Request Blocked: The Same Origin Policy disallows reading the remote resource at file:///home/sandbar/Desktop/nodeapp-local/undefined. (Reason: CORS request not http).

Edge Error: Access to XMLHttpRequest at 'file:///home/sandbar/Desktop/nodeapp-local/undefined' from origin 'null' has been blocked by CORS policy: Cross origin requests are only supported for protocol schemes: http, data, chrome-extension, edge, https, chrome-untrusted.

Naturally, I need to test the web app on my local machine using several browsers before I should upload it to a server and trial it there.

So how do I configure the browser and/or app to allow access to local machine files ?

Firefox will only open in Safe mode, previously it was working but now it's not.

I have Ubuntu 22.04 Firefox version 99.0.1 (64-bit)

When I try to open it in command line, it's also only opening in safe mode but I do also get some error messages that I've included below.

So what does all this stuff below from the command line actually mean? And how do I fix it?

matthew@matthew-desktop:/var/log$ firefox Gtk-Message: 22:02:17.854: Failed to load module "canberra-gtk-module" Gtk-Message: 22:02:17.855: Failed to load module "canberra-gtk-module" ATTENTION: default value of option mesa_glthread overridden by environment. ATTENTION: default value of option mesa_glthread overridden by environment. ATTENTION: default value of option mesa_glthread overridden by environment.

(firefox:23012): Gdk-WARNING **: 22:02:19.034: The program 'firefox' received an X Window System error. This probably reflects a bug in the program. The error was 'BadAlloc'.

 (Details: serial 506 error_code 11 request_code 146 (unknown) minor_code 7)
 (Note to programmers: normally, X errors are reported asynchronously;
  that is, you will receive the error a while after causing it.
  To debug your program, run it with the GDK_SYNCHRONIZE environment
  variable to change this behavior. You can then get a meaningful
  backtrace from your debugger if you break on the gdk_x_error() function.)

Exiting due to channel error. matthew@matthew-desktop:/var/log$

I'm running Firefox 99.0.1 on Ubuntu 22.04. Recently (I think since I updated to Ubuntu 22.04 about a week ago), Firefox has been refusing to show me file upload dialogs. When I click a button that's supposed to give me one, nothing happens.

This has been happening with: - The "attach files" button in Gmail - A file upload button on Gradescope (website for managing homework assignments) - File -> Open File... and Ctrl+O.

Dragging and dropping a file onto an email in Gmail does attach the file -- it's just that the button doesn't work.

I've tried restarting, and I've tried running Firefox in Troubleshoot Mode -- so far nothing has fixed the problem. What else should I do?

Hello dear firefox developpers.

Recently i realized firefox is not saving cache where it used to. that happens some versions ago to now.

By a sudden necessity, i need to access images stored in cache by facebook.

however, firefox has moved its cache, and have no idea where it stores it now.

the second point, is, if there is any way of "surf" cache, im not sure but i wonder, the cache is not what used to be, a collection of files related to what you surfed in the web, videos, htmls, pictures, etc.

I seems the cache now works in a different way, making solid archives composed of many images-videos..., instead of separate files for every image-video.

So, in a brief, 2 things:

- where is cache now - how can i access files in it, (images videos ..)

PD:im using ubuntu 20.04 PD2:have a nice day, and thanks. PD3: trolls will be attended in office hours

FF updated yesterday with the new Ubuntu 22.04 (Pop) update to 99.01. Since the update the volume control inputs are essentially disabled on all web sites, and they default to max - even when muted.

Example - youtube - all videos play full volume Reddit - even muted videos play full volume

The volume can now only be controlled by the system slider.

The same behavior does not occur in other browsers - e.g. Chromium, Opera, etc.

Can anyone assist?

Firefox cannot access my local filesystem. When I open a PDF in the browser and click the Save button, nothing happens. When I click a "Browse..." button to browse the filesystem and upload a file to a website, nothing happens.

This issue does not happen in Google Chrome. This issue persists in Troubleshooting Mode.

Please help! I'd be glad to provide more details as requested.

Hello there to all.. I have been experiencing occasional crashes on the tab when left idle for a while!! I am using Ubuntu linux 22.04 when this occurs..! In Windows 11 or even Windows 10 x64 pro this does not occur to my knowledge at all.. So I am wondering why this is happening only on ubuntu linux 22.04 and not anywhere else??.. Anyways, Thanks for listening and have a great day ahead also..

Thanks in advance!

Since I've upgraded to Ubuntu 22.04 "Firefox" randomly started closing it's self without any crash report what so ever.

I've read some article on Ubuntu forums but I couldn't find any helpful information (Or they didn't work for me)

Please anyone help! I've been using Firefox all the time and has never crashed until the upgrade to Ubuntu 22.04

Any help is highly appreciated!

When I want to drag and drop a tab into a folder of the bookmark toolbars, I can't do it for some folders.

Specifically, it doesn't work for folders that are somewhat in the area of the tab preview animation that pops up when I start dragging the tab. So that is not the same folders every time, it depends on the tab location in the tab bar.

I hope that the explanation was clear enough, I did a screen record also, made it available here https://ufile.io/pikit6xo (335 kB).

Do someone had a similar issue and found a solution?

I'm in troubleshooting mode. Firefox 100, just updated, but bug was there before. Ubuntu 20.04 LTS

I saw where this was a problem with Netflix, Amazon Video and other sites with Fire Fox and that one person even used professional version and still had the same problem.

What I cannot see is where he got the video codex that allow Netflix to work on Fire Fox version 88, let alone this newest version that Mozilla has created.

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:

• Fixed by reinstalling Firefox
• Fixed by resetting Firefox
• Fixed with a restart on a Mac
• Fixed by downgrading to Ubuntu 16.04

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"

how do I work with attachments in unbuntu? it greys out when trying to upload any attachments in gmail and outlook. I am new and cant find unbuntu help on latest update.

Operating System Ubuntu 20.04.4LTS on AMD® Ryzen 3 pro 3200g 64bit processor. Firefox Web Browser version 100.0.2 (64-bit)

The method I can reproduce sound distortion:

I have clear sound playback through both system HDMI speakers or if earphones are plugged in, verified using the Ubuntu Sound Output test left/right (without distortion)

Then if I open a normal Firefox window and listen to YouTube video for example I have no distortion, if I however open I private window, say to access training material on Microchip University site I suddenly have distorted playback.

Please advise why private window opened suddenly distorts my output sound. Sound suspicious.

I'm on Ubuntu 22.04 which is using the snap package of Firefox.

It seems that I cannot open local files in the /tmp directory. When I place a test.html file there and run `firefox /tmp/test.html`, it returns a file not found error. Why?

I don't have the problem with files in my home directory.

After a reinstallation of FIREFOX, it failed to login to sync with Firefox. My account and password input are correct. And I can login to my accout with Chrome (https://accounts.firefox.com/).

my OS: ubuntu 18.04 firefox version: 100.0.2