Firefox Community Forum

when visiting websites using my vpn firefox blocks my entry. I have to disconnect my vpn to allow entry to sites. ive tries numerous fixes and nothing works its frustrating.

Hello! Please report this bug to the developers. When I first launch Firefox after turning on my computer, the window title bar and buttons in the upper right corner (like "Minimize," "Minimize to Window," and "Close") sometimes disappear. If I minimize the browser via the bottom taskbar and then restore it, these buttons and the title bar appear. I'm using Windows 10 x64, with a screen resolution of 2560x1440 (scaled to 125%, but I don't think this has anything to do with the scale or resolution, as other browsers (Opera, Edge) don't have these title bar issues).

See screenshots at the links: https://imgur.com/a/Hbc9yvE (There are two screenshots: 1 - with the window title and buttons (as it should be), 2 - when the window title and buttons disappear)

I've noticed that if I let Windows sit for a while after turning on the PC (2-3 minutes) and then launch Firefox, the problem with the disappearing title bar and buttons seems to disappear. Apparently, Firefox doesn't have time to load properly after Windows loads, and if I launch Firefox almost immediately after Windows loads, the problem described above occurs. And when the OS sits for 2-3 minutes, Firefox apparently loads all its services and processes normally and then works normally, without this error. Firefox ver.: 150.0.3.

This bug was also discussed on the forum by some other users, and they are also experiencing this bug: https://forum.mozilla-russia.org/viewtopic.php?pid=818805

I'm reposting a question already opened here because a moderator suggested to do so. Actually I though I was posting to the international forum from the URL...

I was trying to access a local HTTPS website of an embedded device (a Siemens S7-1500 PLC) that is using a self-signed certificate, but was unable to go on (attached image #1, in Italian language) due to the the SEC_ERROR_REUSED_ISSUER_AND_SERIAL error. I've browsed a similar PLC webserver in the past, so the fact that the device exposes a similar certificate serial number is not so strange for me, considering also it's self-signed.

The problem is that I cannot follow the instructions of the Mozilla knowledgebase here because I'm not able to identify the correct certificate of the website!

In the attached image #2 you can see that the connection is detected as not encrypted, I suppose because only the form part of the HTML that is posting the data using HTTPS while the rest is using HTTP, but I'm not sure. If I click on the padlock icon (attached image #3) the info about the current certificate is not displayed.

Then I went into Tools > Options and searched for "certificates"; as you can see in the attached images #4 and #5, neither in the Servers tab nor in the Authorities tab I can find any item that is related to 192.168.10.2 (the webserver IP address) or Siemens (the embedded device manufacturer). But unfortunately the error persist! Initially there was a 192.168.10.2:443 line in the Servers tab and I removed it and restarted Firefox, but it didn't solve, so at the moment the situation is the one depicted by the attachments.

I had to use Microsoft Edge to access the website, but I would like to solve this issue and use Firefox instead. Is there anything else I can do to bypass the error? Why doesn't the error page provide a way to correctly identify the wrong certificate using its fingerprint and/or name? Or, maybe, is there a way to disable this check for local IP addresses or for items in a whitelist?

Thanks for your help.

In the menu for choosing which tab to add to a split view, tabs with the name/link of the original do not show up. I would like this fixed, although this is really only a minor inconvenience when duplicating a tab to put it into split view.

I already left a topic here on this issue, then no one could help me, in general, the problem appeared a month ago in me, as after I reinstalled Windows, downloaded the facit anti-cheat steam browser and went to play facit, since facit requires some settings in the bios for it to work, when downloading the anti-cheat, it asks to restart the computer, it asks for tpm 2.0 secure boot , VBS , iommu , and so I thought for a long time what could be the problem that it is after installing the anti-cheat facit that the browser breaks. As a result, I found out that it is when the iommu function is enabled in the firefox bios that it breaks , if you disable this setting, the browser works, although it gave an error before and did not start at all, I spent a month trying to figure out what the problem was, I am a Windows optimizer and I had custom windows and a lot of different settings for optimizing windows, but now I have installed official windows and the problem is still there, it turned out that it is far from in windows and windows optimization, because I have many friends who use custom windows and optimization settings and everything works for them, and so I found out that it's about iommu , just a couple of days ago, I updated the bios, I had the old version, now the newest one is still present, if there is, then help me figure it out.

here is the error code from the "details" by the way, not only firefox breaks, but also chrome, brave, etc.

AvailablePageFile: 37469605888 AvailablePhysicalMemory: 32424693760 AvailableVirtualMemory: 138531310682112 BackgroundTaskMode: 0 BuildID: 20260403140140 CPUMicrocodeVersion: 0xa20120a CrashTime: 1775599624 DOMFissionEnabled: 0 DOMIPCEnabled: 0 HeadlessMode: 0 InstallTime: 1775587593 LastStartupWasCrash: 0 MinidumpSha256Hash: 89a8c6296c245dae30e1562163d1ec0d37df24dffa0a6e612f9294854213f8ff ModuleSignatureInfo: {"Mozilla Corporation":["firefox.exe","xul.dll","gkcodecs.dll","nss3.dll","mozglue.dll","lgpllibs.dll"],"Microsoft Windows":["dbgcore.dll","winrnr.dll","twinapi.dll","wshbth.dll","pnrpnsp.dll","NapiNSP.dll","netprofm.dll","npmproxy.dll","dhcpcsvc6.DLL","dhcpcsvc.dll","winnsi.dll","DWrite.dll","dbghelp.dll","winmm.dll","Windows.UI.Immersive.dll","twinapi.appcore.dll","InputHost.dll","WindowManagementAPI.dll","textinputframework.dll","Windows.UI.dll","ktmw32.dll","wsock32.dll","version.dll","propsys.dll","WinTypes.dll","CoreUIComponents.dll","CoreMessaging.dll","nlaapi.dll","uxtheme.dll","dwmapi.dll","kernel.appcore.dll","windows.storage.dll","ntmarta.dll","IPHLPAPI.DLL","dnsapi.dll","mswsock.dll","CRYPTBASE.dll","wldp.dll","ntasn1.dll","ncrypt.dll","msasn1.dll","profapi.dll","bcryptPrimitives.dll","msvcp_win.dll","ucrtbase.dll","cfgmgr32.dll","wintrust.dll","gdi32full.dll","crypt32.dll","KERNELBASE.dll","win32u.dll","bcrypt.dll","sechost.dll","SHCore.dll","user32.dll","advapi32.dll","kernel32.dll","nsi.dll","gdi32.dll","ws2_32.dll","rpcrt4.dll","shlwapi.dll","ole32.dll","shell32.dll","oleaut32.dll","msctf.dll","combase.dll","msvcrt.dll","psapi.dll","clbcatq.dll","imm32.dll","ntdll.dll"],"Microsoft Windows Software Compatibility Publisher":["msvcp140.dll","VCRUNTIME140.dll","VCRUNTIME140_1.dll"]} ProcessType: main ProductID: {ec8030f7-c20a-464f-9b0e-13a3a9e97384} ProductName: Firefox ReleaseChannel: release SafeMode: 0 SecondsSinceLastCrash: 12318 StartupCacheValid: 1 StartupCrash: 1 StartupTime: 1775599624 SubmittedFrom: Client SystemMemoryUsePercentage: 5 Throttleable: 1 TotalPageFile: 39652315136 TotalPhysicalMemory: 34283606016 TotalVirtualMemory: 140737488224256 UptimeTS: .2474393 Vendor: Mozilla Version: 149.0.2

with the last and now the most recent Facebook versions i ahve beem having problems with Facebook, now it may be Facebook but i have it more on Firefox even with extentions shut off i get i what is it please help

what it says on the tin. went data purging with ol reliable WinDirStat and found this absolute behemoth of a file in the profiles directory for firefox. its especially weird considering the entire Firefox directory itself is only 1.5GB with this menace taking 1.3 of it. I cant imagine that bookmarks, search history, passwords, the works takes up any more than about 300mb. so im wondering if im just stuck in the early days of data or if the file really is just that girthy.

Hi all,

After the last update the former Mozilla Test Pilot "Snooze Tabs" isn't working for me any more, I tell a tab to snooze and it just stays where it is. https://addons.mozilla.org/en-GB/firefox/addon/snoozetabs/

I've tried running with addons disabled and then running with addons active again and the behaviour is the same. It's the same behaviour whether I run from the toolbar or the context menu.

I'm presuming this problem is related to Firefox update mechanics. Any suggestions for how to get this working again please?

Cheers :)

Hello brothers and sisters, i am need help! I'm experiencing performance issues when surfing the 9GAG website. The amount of RAM consumed by this page is growing exponentially. It's gotten to the point where this tab can consume up to 5GB of memory, and that's not the limit. This issue hasn't happened before. I can't figure out what's causing it.

What I did to fix the problem: I reinstalled the browser. I reinstalled add-ons. I reset my old profile, saving only bookmarks and passwords. I reinstalled the operating system. None of this helped. However, my friends don't have this problem with this site. Please help.