hello, can you try to replicate this behaviour when you launch firefox in safe mode once? if not, maybe an addon that's changing your useragent information is interfering here...

Troubleshoot extensions, themes and hardware acceleration issues to solve common Firefox problems

thank's!

sir i request my computer whatsaap web open sir i am request please

whatsapp problem

I have the same problem, having the latest version of Firefox, web.whatasapp is not working (screenshot attached).

I've tried: - in Safe mode as well with all Add-ons disabled, it's the same problem - clear Cache - the same problem - refresh firefox the same problem - uninstalled firefox and installed back - the same problem

Using the latest firefox 84 version.

What is wrong here?

Hi mr.deenoo

You can check the user agent via the "Help -> Troubleshooting Information" (about:support) page.

• https://support.mozilla.org/en-US/kb/how-reset-default-user-agent-firefox

You can check out at the browserspy website how websites see you:

• http://browserspy.dk/browser.php
• http://browserspy.dk/headers.php

What is seen in troubleshooting. The issue is not whatsapp only it happens with other websites which somehow detects wrong the version of the firefox.

Name Firefox Version 84.0 Build ID 20201211215739 Distribution ID Update Folder C:\ProgramData\Mozilla\updates\308046B0AF4A39CB Update History Update Channel release User Agent Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:61.0) Gecko/20100101 Firefox/61.0 ql66u54b OS Windows_NT 10.0 19042 Application Binary C:\Program Files\Mozilla Firefox\firefox.exe Profile Folder C:\Users\dghit\AppData\Roaming\Mozilla\Firefox\Profiles\t76zo9da.default-release-1608209153491 Enabled Plugins about:plugins Build Configuration about:buildconfig Memory Use about:memory Performance about:performance Registered Service Workers about:serviceworkers Launcher Process Enabled Multiprocess Windows 1/1 Fission Windows 0/1 Disabled by default Remote Processes 8 Enterprise Policies Inactive Google Location Service Key Found Google Safebrowsing Key Found Mozilla Location Service Key Found Safe Mode false Profiles about:profiles

Hello,

Thank you for looking into this issue. Attached are the screenshots from the debug pages.

I think some information are detected wrong, for instant it's a Windows 10 Enterprise laptop with Rysen CPU and the browsers detects it as Linux ?

Managed to temporary solve the issue by deleting the information from "general.useragent.override" (screenshot attached).

But if I close the browser and re-open it - it will be put back again. Why is that?

What is wrong here?

Guys any solution for a permanent fix?

What app is keep overrinding those firefox version values?

Guys is anyone here to help?

What causes the overide agent?

I tried to create a user.js file and put it in C:\Users\username\AppData\Roaming\Mozilla\Firefox\Profiles\mydefaprofile.default

the user.js file has this in it

// eliminate the override shit user_pref("general.useragent.override", "");

But it doesn't seem to work. Have I put it correctly?

Any solution?

I located the prefs.js file and noticed this info in there user_pref("general.useragent.override", "Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:61.0) Gecko/20100101 Firefox/61.0 ql66u54b");

I've deleted the override part but everytime I started the browser is being put back there again the same stupid info.

What causes this override issue???

hi, it's most likely one of your installed extensions that is tampering with your useragent information... Troubleshoot issues related to add-ons

Note that you shouldn't set general.useragent.override to an empty string via user.js as that will disable the user agent (the user agent will be an empty string causing issues).

• user_pref("general.useragent.override", "");

I have the same problem, having the latest version of Firefox, web.whatasapp is not working (screenshot attached). I've tried: - in Safe mode as well with all Add-ons disabled, it's the same problem - clear Cache - the same problem - refresh firefox the same problem - uninstalled firefox and installed back - the same problem Using the latest firefox 84 version. What is wrong here?

I have the same problem

I have the same problem

Have the same problem, deleted Firefox, reinstalled without any extensions, dark mode does not help.

Use ist with Mac OS Big Sur 11.1 have Paralells Desktop 16 with win - and I try to rum WhatsAPP on MAC - does not work any more!

hi, it's most likely one of your installed extensions that is tampering with your useragent information... Troubleshoot issues related to add-ons

It's not any extension's fault< I've already tried many times, fresh install and without any extension, tried safe mode, the same problem. Look at the other users, others have the same problem.

Note that you shouldn't set general.useragent.override to an empty string via user.js as that will disable the user agent (the user agent will be an empty string causing issues).

• user_pref("general.useragent.override", "");

---

I've already tried without empty string, put a higher version there user_pref("general.useragent.override", "Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:61.0) Gecko/20100101 Firefox/84.0");

But the problem is the same, something keep overrides that version with an older one Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:61.0) Gecko/20100101 Firefox/61.0 ql66u54b

I can't believe no one know what can cause that override, really, how come no one knows how to debug and fix this? I've provided many information here.

Do you currently see general.useragent.override with a value that contains 'ql66u54b' on the about:config page ?

Start Firefox in Safe Mode to check if one of the extensions ("3-bar" menu button or Tools -> Add-ons -> Extensions) or if hardware acceleration or userChrome.css is causing the problem.

• switch to the DEFAULT theme: "3-bar" menu button or Tools -> Add-ons -> Themes
• do NOT click the "Refresh Firefox" button on the Safe Mode start window

• https://support.mozilla.org/en-US/kb/troubleshoot-firefox-issues-using-safe-mode
• https://support.mozilla.org/en-US/kb/troubleshoot-extensions-themes-to-fix-problems

Do a clean reinstall of the current Firefox release and delete the Firefox program folder before installing a fresh copy of the current Firefox release.

• download the Firefox installer and save the file to the desktop
  *https://www.mozilla.org/en-US/firefox/all/#product-desktop-release

If possible uninstall your current Firefox version to cleanup the Windows Registry and settings in security software.

• do NOT remove "personal data" when you uninstall the current Firefox version, because this will remove all profile folders and you lose personal data like bookmarks and passwords including personal data in profiles created by other Firefox versions

Remove the Firefox program folder before installing that newly downloaded copy of the Firefox installer.

• (64-bit Firefox) "C:\Program Files\Mozilla Firefox\"
• (32-bit Firefox) "C:\Program Files (x86)\Mozilla Firefox\"

• it is important to delete the Firefox program folder to remove all the files and make sure there are no problems with files that were leftover after uninstalling

Your personal data like bookmarks is stored in the Firefox profile folder, so you won't lose personal data when you reinstall or update Firefox, but make sure NOT to remove personal data when you uninstall Firefox as that will remove all Firefox profile folders and you lose your personal data.

If you keep having problems then you can create a new profile as a quick test to see if your current profile is causing the problem.

• https://support.mozilla.org/en-US/kb/profiles-where-firefox-stores-user-data
• https://support.mozilla.org/en-US/kb/back-and-restore-information-firefox-profiles

Reinstall Firefox

• https://support.mozilla.org/en-US/kb/troubleshoot-and-diagnose-firefox-problems