Diễn đàn hỗ trợ Firefox

I am using Windows 11 on a Dell laptop. I have the latest version of Firefox installed. I have used Firefox as my default browser on this machine and O/S for the last year with no problems. I can use Firefox to get to other websites without issue, using either a 5G cellular connection or a WiFi connection direct from the Dell laptop. I DO NOT use password vaults or any kind of automated password entry, and I do not have any bio-metric access functions activated on the laptop; I enter usernames and passwords manually, as needed. I have accessed my Outlook Hotmail account using Firefox without problem up until about 4 weeks ago. Now, I can enter my username successfully, but when I then enter my password I get a rejection screen response from Microsoft (clicking on it, I then get a "help" screen about what to do after getting a 404 message). After navigating through a maze of screens from Microsoft I will get an opportunity to verify my identity by using my cell phone and entering a 6-digit code (essentially a form of "2 factor" identification) and then I will get access to Outlook on the Firefox browser. I should mention here, that I don't use 2 factor ID on my email or with Outlook, and after entering my password, I would have been connected to my email directly. I do NOT have this issue when I try logging in to Outlook using Chrome or Edge on the same machine. I have: rebooted my machine, reinstalled the latest version of Firefox, cleared cache, used Firefox in Safe Mode, cleared cookies and browser history, turned off tracking protection, cleared URLs from tracking protection exceptions, and tried various combinations of all of the above. I also ran "scannow" and "DISM" functions to make sure Windows is not corrupted. Nothing has fixed the problem, and, Microsoft Support claims that since the other browsers work, the problem must originate with Firefox (surprise, surprise! ...). Any assistance in what steps to take to get Outlook to accept passwords that are sent through Firefox would be greatly appreciated!

Every day, I get the same reminders about new Firefox features. Every day, there's one about tab groups. I get daily reminders to sync my bookmarks. I do not need this every single day.

How do we turn off the reminders? Why do they not stop appearing after an update, the way they normally do?

Thanks!

Since I upgraded from FF128-esr to FF140-esr I always get the "Firefox is being updated by another instance" This is really driving me crazy, as I checked / did / .... everything (and even more) I found on the internet related to that.

Nothing helps !

Creating and using a new default profile didn't help

Finally I ended up uninstalling FF completely (making sure no -zero- leftovers remained in ProgramFiles, AppData a.s.o.), and reinstalled FF140.7.0-esr freshly. After installation I started FF immediately with the created default profile (only existing one) --> SAME THING : "Firefox is being updated by another instance"

And this is really a FF140 thing, when I go back to FF128, on the same computer, same profiles, ...., the problem is gone.

I would like to know in detail what checks are really done by FF to decide to give that "Firefox is being updated by another instance"

Firefox 147.0.4 on macOS 26.3 does not work via SOCKS proxy.

Firefox 147.0.4 on Windows 11 x64 works fine via the same intranet SOCKS proxy, with exactly the same settings.

The advantage of Firefox is its flexibility. It supports its own SOCKS proxy settings, independent of systems-wide ones. Unfortunately, it seems this Firefox feature is broken on macOS (but Windows version works perfectly).

Safari 26.3 (21623.2.7.11.6) and DuckDuckGo 1.177.0 (625) web-browsers that use system-wide macOS SOCKS proxy settings also works fine with this intranet proxy server. So it seems SOCKS proxy server itself is OK, and the problem is confined to Firefox on macOS.

Has anyone seen Firefox 147 on macOS work via SOCKS proxy? Is there a principal difference between how Firefox handles SOCKS proxy on macOS vs. Windows? What might be the best way to address the problem on macOS?

Thanks!

I am only able to shut off these new tones Firefox makes in Windows 11 Volume control center by muting Firefox. Then if I do, I am forced to return to that button to unmute if I want to listen to a YouTube video etc.

I've never had this issue with Firefox until 2026. I'd like to find a setting within the Firefox Settings, but there is nothing. No other browser does this. Only Firefix.

It's annoying. I'm going to have to start putting Firefox aside and stop using it. It's too much of a nuisance.

Firefox has no customer support. Only a Community Forum. So, I don't think they'll miss me.

After the most recent upgrades (both MacOS to 26.4 beta and Firefox 147.0.4), Firefox is giving me this message: Hmm. We’re having trouble finding that site. Any suggestions?

Dear Everyone, Facing issue with deploying Configuration Profile for Extension Settings via Intune. I have already imported the "firefox.admx and mozilla.admx". then i created the firefox Extension using OMA-URI as show below

OMA-URI: ./Device/Vendor/MSFT/Policy/Config/Firefox~Policy~firefox~Extensions/ExtensionSettings

Value : <enabled/><data id="ExtensionSettings" value='{"*":{"installation_mode":"blocked"},"{d10d0bf8-f5b5-c8b4-a8b2-2b9879e08c5d}":{"installation_mode":"allowed"},"{5caff8cc-3d2e-4110-a88a-003cc85b3858}":{"installation_mode":"allowed"},"{d187b435-812e-4813-a93e-edccc4118f9d}":{"installation_mode":"allowed"},"uBlock0@raymondhill.net":{"installation_mode":"allowed"},"langpack-de@firefox.mozilla.org":{"installation_mode":"allowed"},"langpack-cs@firefox.mozilla.org":{"installation_mode":"allowed"},"langpack-en-GB@firefox.mozilla.org":{"installation_mode":"allowed"},"langpack-fr@firefox.mozilla.org":{"installation_mode":"allowed"},"langpack-ga-IE@firefox.mozilla.org":{"installation_mode":"allowed"},"langpack-it@firefox.mozilla.org":{"installation_mode":"allowed"},"langpack-pl@firefox.mozilla.org":{"installation_mode":"allowed"},"alterechtschreibung@gmail.com":{"installation_mode":"allowed"},"cs@dictionaries.addons.mozilla.org":{"installation_mode":"allowed"},"fr-dicollecte@dictionaries.addons.mozilla.org":{"installation_mode":"allowed"},"ga-IE@dictionaries.addons.mozilla.org":{"installation_mode":"allowed"},"it-IT@dictionaries.addons.mozilla.org":{"installation_mode":"allowed"},"pl@dictionaries.addons.mozilla.org":{"installation_mode":"allowed"},"de_DE@dicts.j3e.de":{"installation_mode":"allowed"},"de_CH@dicts.j3e.de":{"installation_mode":"allowed"},"ms.pad.firefox@microsoft.com":{"installation_mode":"allowed"},"ciscowebexstart1@cisco.com":{"installation_mode":"allowed"},"salesforceinspector@reloaded":{"installation_mode":"allowed"},"jid1-DBcuAQpfLMcvOQ@jetpack":{"installation_mode":"allowed"}}'/>

And also i created below one

Initial setup

   Download the latest release from our GitHub page and unzip the file.
   Open the file firefox.admx in an editor.
   Sign in to Microsoft Intune at https://intune.microsoft.com.
   Click Devices then Configuration (https://intune.microsoft.com/#view/Microsoft_Intune_DeviceSettings/DevicesMenu/~/configuration).
   Click Create on the Policies tab and then New Policy.
   Select Windows 10 and Later as the platform and Templates as the profile. Click Custom and then click Create.
   Type Firefox Configuration or any descriptive name.
   Enter an optional description.
   Click Next.
   Click Add.
   Enter a name like Firefox ADMX.
   Enter an optional description.
   For the OMA-URI, enter ./Device/Vendor/MSFT/Policy/ConfigOperations/ADMXInstall/Firefox/Policy/FirefoxAdmx.
   Select String for the Data type.
   Copy all of the text from the firefox.admx file into the Value field.
   Click Add. 

After deployed to production getting error -2016281112

Outcome is: Setting name: ExtensionSettings [./Device/Vendor/MSFT/Policy/Config/Firefox~Policy~firefox~Extensions/ExtensionSettings] ----error code -2016281112

2. FirefoxAdmx [./Device/Vendor/MSFT/Policy/ConfigOperations/ADMXInstall/Firefox/Policy/FirefoxAdmx] ----> Succeeded

Please help me on this to fix the issue

On macOS, I set System Settings -> Desktop & Dock -> "Double-click a window's title bar" to "Fill".

In Firefox, double-clicking the window title bar does nothing. If I change the macOS setting to "Zoom", double-click works correctly in Firefox doing Zoom effect.

I confirmed that other applications respond correctly to the "Fill" setting.

Environment: - macOS version: 26.3 - Firefox version: 147.0.4 (aarch64)

2026-02-17

for about 8 years now, on and off, on hundreds of OS-es, clean installs of firefox etc. sometimes - not always - typing into the firefox search bar and pressing enter does nothing

i have bit-warden, u-block-origin and stylus installed (but they shouldn't be running on the 'new-tab-page' - is my firefox sync-profile containing some firefox-breaking-errors? (latest Win-11)

On outlook.com sign in with password does not work. It gives "Please retry with a different device or other authentication method to sign in." Works fine in edge.

I just had a firefox tab with a pop up asking me to try ai features... my options were "yes" or "maybe later". How do I stop the slop sales? I want ZERO pop ups... from Mozilla or anyone else! I didnt see settings that would disable mozilla sales pop ups - is there some way to turn these off permanently? I have already turned off the ai features. Really appreciate any suggestions!

David40 David40 Making moves

‎15-02-2026 03:37 AM

Spectrum recently updated their email systems and Firefox can no longer be used to check Spectrum webmail email accounts. I used to be able to go directly to the webmail but now they make you log into your Spectrum account to get to the email accounts and there is something about Firefox that is not up to their security standards. I am running Windows 7 with the latest Firefox that will work in 7. I am also running the Brave browser on Windows 7 and that works with the new Spectrum system. I prefer using Firefox over Brave so could you please correct whatever deficiency exists in Firefox to make it compatible with Spectrum webmail?

FYI, Firefox on my Windows 10 machine has the same issue.

Error Message: We're sorry, something didn't work quite right. Please try again from home or contact us for assistance. IDID-4049.

Thank You

I have an issue where the following operations with the "new" profile manager don't work: - setting up a new profile (about:newprofile in the new profile is just blank) (a new profile gets created though) - deleting a profile (about:newprofile is just blank) - editing any profile that is not the original profile (about:editprofile is just blank) (works with the original profile) - the select profile interface from the account or menu button is blank when opening it from any profile that is not the original profile

What works tho is calling about:profilemanager from any profile. From there any profile can be selected and switched to.

I'm using the Bazzite (Linux distro that is Fedora based). I'm fairly new to Linux so that could be a issue, the problem was there from the get-go though and since Firefox was preinstalled I don't believe I could've messed up much.

Firefox version is 147.0.4 Bazzite version is 43.20260211.0 (Kinoite)

Reboot doesn't fix these issues. Uninstalled Firefox with deleting user data, installed it again and same behavior appears again.

I also tried installing a Firefox fork (Waterfox). It had the same issues.

I would appreciate any help and would be willing to share more detailed date if it helps somebody help me.

The attached screenshots mostly show the UI that is not working as expected.

As long as my computer doesn't go to sleep Im fine. If it does, when i open firefox, i must refresh to be able to find my bookmarks and passwords. What am I doing wrong? Thanks in advance! Micha

On my Firefox I have click something and choose Copilot. What I did have remove Chatgpt and enable Copilot. I want to have Chatgpt back but I cannot enabled. Please help?