Firefox Community Forum

Windows 11 Pro - Dell XPS8940 desktop - i9

Firefox will not play video from a website. If I save the video, it is a MP4 file. Windows Media Player and VLC will play the video file. But the browser shows the message: "No video with supported format and MIME type found."

Chrome and Edge will play this video correctly in their browsers. Firefox will not play the video on 3 different computers, and even when a different user account is involved (without Firefox sync).

The evidence seems to point at firefox. The website is a Wordpress site.

Is it possible that the website is the problem? If so, why do Edge and Chrome work?

I uninstalled Firefox (latest version) and reinstalled it. Not fixed.

My windows updates are current, as are Dell updates.

This is stumping me. I hope someone can help.

Using Firefox on Windows 11 I cannot access DocuSign files. I need to send a form to an on-line bank and want to use the DocuSign function. When I click on that option on the site all that displays on the screen is DOCUSIGN but the feature doesn't show. I tried turning off security addons such as Privacy Badger and Ghostery but that didn't help. I can get to the feature using Edge but I really don't like using that. Is there a setting that I've missed that may cause the disconnect?

The generic DocuSign site it https://powerforms.docusign.net/. Any other details in the URL I used refer to my bank and the account, so I am not including that information.

Thank you.

Trying to download updates from Intel.com and as soon as I click the download button, Firefox just locks up and won't allow me to do anything. I have to basically shut down firfox through task manager to get the browser to work again. I have 139.04 which is the latest update for Firefox

A message to Mozilla if this is a bug how about fixing the problems that some people are having instead of consintration on implementing AI into Firefox as I want a browser that doesn't and isn't link to AI as many other people do as well as some if not most of us are sick to ther back teeth with everything having AI installed with in the programs.

I get this error code when I click this link: https://app.getresponse.com/click.html?x=a62b&co=zuZIy&lc=hxmU75&mc=Iu&s=Hb9xCO&u=qU&z=EF9yGAP&

This is for any link on 1Funny.com Newsletter

Using Windows 11 just reloaded on new hard drive (Solid State). Old hard drive took up smoking. This error does not happen on any other site and did not happen before.

In early June 2025 I finally ditched Windows 10 for 11 and I've been a Firefox user since practically the very beginning of Mozilla.

Now, I notice that the "Restore Previous Session" button in the drop-down of the FF menu is missing. Additionally, I discovered late in the game that Mozilla DID listen to me and gave us the ability to "name" or "tag" an entire window in the browser. This was a HUGE boon to productivity as I'm constantly toggling from window to window to tab to tab.... Now, with the most recent update this ability seems to have disappeared....

Hello, I think I may have asked about this in the past but cannot recall if I received an answer. Under Settings, I get the message "Your browser is being managed by your organization." This is my home computer and is not being managed by any organization. When I click for more information, it gives me a screen with the following information:

Policy Name Certificates

Policy Value ImportEnterpriseRoots

                         true

If I could get more information on this suspected error, or how to correct it, that would be great. Thanks!

Environment:

  Windows 11 Pro, Version 25H2, Updated windows (include KB5074109) on Jan 16, 2026.
  Firefox version 107.0  

Issue:

  Firefox freeze shortly (e.g. after play YouTube video for less than a couple minutes, just browser YouTube videos for a while, or just open about:preferences page).
  
  I installed  Firefox 147.0.1. Same issue. 

  Hover cursor to Firefox, it becomes busy (blue spinner)

  Note: Firefox works fine before the windows update. Chrome exits suddenly after the update too.

Task Manager: shows 15 FireFox processors with 0% CPU usage.

Event Viewer: Fault bucket 1541027055463960799, type 5 Event Name: AppHangB1 Response: Not available Cab Id: 0

Problem signature: P1: firefox.exe P2: 147.0.1.271 P3: 696a121b P4: 79cd P5: 67246080 P6: P7: P8: P9: P10:

Attached files: \\?\C:\ProgramData\Microsoft\Windows\WER\Temp\WER.2bcf31a5-033f-4855-91a8-348910b535af.tmp.WERInternalMetadata.xml

These files may be available here: \\?\C:\ProgramData\Microsoft\Windows\WER\ReportArchive\Critical_firefox.exe_a06ac11b8d36ddc3afaf533a3621d865d77465b2_0c016577_0f9df051-1632-43c0-8b21-1bdd35f2b339

Analysis symbol: Rechecking for solution: 0 Report Id: 4ecd169f-49c4-4d96-bd8d-324fc999200b Report Status: 268435456 Hashed bucket: 26b5c866fc91a78be562d3f1363210df Cab Guid: 0

WER.f4147c4f-eeb0-4620-a50a-da8b248e2de1.tmp.WERInternalMetadata:

<WERReportMetadata> <OSVersionInformation> <WindowsNTVersion>10.0</WindowsNTVersion> <Build>26200</Build> <Product>(0x30): Windows 10 Pro</Product> <Edition>Professional</Edition> <BuildString>26100.7623.amd64fre.ge_release.240331-1435</BuildString> <Revision>7623</Revision> <Flavor>Multiprocessor Free</Flavor> <Architecture>X64</Architecture> <LCID>1033</LCID> <BuildLayers> <BuildLayer LayerName="26100.1.amd64fre.ge_release.240331-1435" OsMajorVersion="10" OsMinorVersion="0" BuildNumber="26200" QfeNumber="7623" IsTopLevel="1" IsChecked="0" BuildStamp="240331-1435" BuildBranch="ge_release" BuildArch="amd64" BuildLab="26100.ge_release.240331-1435" BuildLabEx="26100.1.amd64fre.ge_release.240331-1435"/> <BuildLayer LayerName="26100.1.amd64fre.ge_release.240331-1435" OsMajorVersion="10" OsMinorVersion="0" BuildNumber="26200" QfeNumber="7623" IsTopLevel="0" IsChecked="0" BuildStamp="240331-1435" BuildBranch="ge_release" BuildArch="amd64" BuildLab="26100.ge_release.240331-1435" BuildLabEx="26100.1.amd64fre.ge_release.240331-1435"/> <BuildLayer LayerName="26100.7623.amd64fre.ge_release_svc_prod1.260108-1011" OsMajorVersion="10" OsMinorVersion="0" BuildNumber="26100" QfeNumber="7623" IsTopLevel="0" IsChecked="0" BuildStamp="260108-1011" BuildBranch="ge_release_svc_prod1" BuildArch="amd64" BuildLab="26100.ge_release_svc_prod1.260108-1011" BuildLabEx="26100.7623.amd64fre.ge_release_svc_prod1.260108-1011"/> <BuildLayer LayerName="26100.7623.amd64fre.ge_release_svc_prod1.260108-1011" OsMajorVersion="10" OsMinorVersion="0" BuildNumber="26100" QfeNumber="7623" IsTopLevel="0" IsChecked="0" BuildStamp="260108-1011" BuildBranch="ge_release_svc_prod1" BuildArch="amd64" BuildLab="26100.ge_release_svc_prod1.260108-1011" BuildLabEx="26100.7623.amd64fre.ge_release_svc_prod1.260108-1011"/> </BuildLayers> </OSVersionInformation> <ProblemSignatures> <EventType>AppHangB1</EventType> <Parameter0>firefox.exe</Parameter0> <Parameter1>147.0.1.271</Parameter1> <Parameter2>696a121b</Parameter2> <Parameter3>79cd</Parameter3> <Parameter4>67246080</Parameter4> </ProblemSignatures> <DynamicSignatures> <Parameter1>10.0.26200.2.0.0.256.48</Parameter1> <Parameter2>1033</Parameter2> <Parameter22>79cdc92835a52d4d6fe18eaad0b4697c</Parameter22> <Parameter23>ee57</Parameter23> <Parameter24>ee5795050602fee0b60b85074fca3a49</Parameter24> <Parameter25>79cd</Parameter25> <Parameter26>79cdc92835a52d4d6fe18eaad0b4697c</Parameter26> <Parameter27>ee57</Parameter27> <Parameter28>ee5795050602fee0b60b85074fca3a49</Parameter28> </DynamicSignatures> <SystemInformation> <MID>537F40F1-EDA1-4A66-8FAF-BC926D27E2F5</MID> <SystemManufacturer>Dell Inc.</SystemManufacturer> <SystemProductName>Latitude 5530</SystemProductName> <BIOSVersion>1.32.1</BIOSVersion> <OSInstallDate>1752501831</OSInstallDate> <OSInstallTime>2025-07-14T14:03:43Z</OSInstallTime> <TimeZoneBias>05:00</TimeZoneBias> </SystemInformation> <SecureBootState> <UEFISecureBootEnabled>1</UEFISecureBootEnabled> <PolicyPublisher>{77fa9abd-0359-4d32-bd60-28f4e78f784b}</PolicyPublisher> </SecureBootState> <ReportInformation> <Guid>0483653f-e57b-460c-be7b-d7958bac7471</Guid> <CreationTime>2026-01-16T19:20:43Z</CreationTime> </ReportInformation> </WERReportMetadata>

Hi, when I want to zoom in to the website page, I cant seem to find the horizontal scroll, thus I cant see the left side of the page that I zoomed in. Please make the horizontal scroll available. Thank you.