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Lately, I have been getting a pop-up error when I start and close Firefox. The error reads: "XULRunner Could not determine any profile running in backgroundtask mode!"

I have found posts such as this one: https://support.mozilla.org/en-US/questions/1398228 and other posts suggesting to disable the scheduled task in Windows Task Scheduler, but none of the solutions have worked thus far. Anyone know of any other solutions?

I've just started getting error messages that I need to enter my password to send emails. I've tried that but it still keeps saying unable to connect to the server. This has been happening for about two days now. I've tried updating Thunderbird, restarting Thunderbird and restarting my PC. None of this has worked. I made no changes to my system, software or home network. Any help would be appreciated. Thanks, Dave

Dear Support Team,

After updating to last Mozilla Firefox version (126.0.1) all my ngx-datatable tables are overlapping all rows over the first one even if the entire height of the table is correct calculated.

This is a blocking point. I need assistance urgently.

Here is a very strange problem: 1. all my notifications about interac are attributed to only one person: INTERAC e-Transfer: A money transfer from X has been automatically deposited. Under correspondents I have Y, no matter what X is. 2. When I do a global search for INTERAC, all notifications show up, but attributed to Z, different from X and Y. Further, Z only sent me an interac transfer once, maybe 10 years ago. Indeed, if I global search for Z, none of the interac notifications show up. 3. this is ONLY on Thunderbird, not at the server.

Any ideas?

I'm hoping someone can help with a conundrum.

A few years ago, whenever I first started Firefox--whether I had just started up my computer or had exited Firefox and opened it back up--it would take several minutes for Firefox to load any website (Google, Amazon, weather.com--anything). Once the first site loaded, it would load subsequent sites normally. Interestingly, it was only my default profile that was affected; if I used another profile or created a new one, websites would load within seconds of my starting Firefox.

I finally broke down and created a new default profile, imported my history/bookmarks/etc., reinstalled extensions, adjusted settings, etc. The new profile behaved nicely, loading the first website within a few seconds of Firefox starting. But over time, the load time has gradually increased to the point where it is now behaving just like the old profile: I load Firefox, I try to go to any website, and it takes several minutes for it to load.

Any ideas what's happening/what's the problem? Hoping someone out there has some wisdom and can help troubleshoot. Thanks!

Hello! Since I couldn't find help in the forums, I will create a new question. For about a year now the PC at my work will not open mailto-links correctly. There is no account to select from, the subject has a lock-symbol. The receiver's address is correct though (I replaced it with "address" for the screenshot). This PC is the only one I know with that problem and only with external mailto-links. If I click on an email address inside a mail, it opens it correctly. Thunderbird version 115.11.1 (32-Bit), Win 10

It's pretty impractical, so I am hoping for help. Thank you!

I am trying to add an mp4 video to my website using the following code:

<video width="320" height="240" controls>
  <source src="images/###.mp4" type="video/mp4">
</video>

where ### is the name of the video file. I get the following error message:

"No video with supported format or MIME type found."

In the console the following is displayed:

"Media resource http://127.0.0.1:5502/images/###.mp4 could not be decoded. video.html All candidate resources failed to load. Media load paused. video.html Media resource http://127.0.0.1:5502/images/###.mp4 could not be decoded, error: Error Code: NS_ERROR_DOM_MEDIA_METADATA_ERR (0x806e0006)"

Runs just fine in Chrome and I have no pop-up blockers installed. Autoplay is set to be allowed for all websites.

Windows 11 version 23H2. Firefox version: 126.0 (64-bit)

I'm on Thunderbird 115.11.1 on Windows 11. I got an error that there wasn't space to download emails today. My Thunderbird profile shows this:

            121 File(s)    100,867,461 bytes
             24 Dir(s)  455,503,380,480 bytes free

In the startupCache folder File Explorer says that there are 2500 directories, 660 files, and 4.94 TB of content. The last few lines of a dir command show this. Note the weird dates on the directories and garbage names.

06/02/2024 12:15 AM 164,221 startupCache.8.little 08/16/2057 01:32 AM <DIR> }+ 3an^.1q 08/08/1997 03:53 AM <DIR> √µÇ┌╪,Pù. 05/04/1990 02:21 PM 467,310,242 4φ)τ~o╗D.cÖê 04/24/2063 05:53 AM <DIR> ╤fεª╫s₧&.╘rα 02/08/2083 12:31 AM 2,596,407,552 «-╞┐I┤U.`xs 10/22/2020 06:59 PM <DIR> *¼²Ñ▐'╣.░╦ 03/06/2078 11:59 AM 3,915,121,951 n│ê/ë∞3Γ.f└ï The parameter is incorrect.

     <DIR>          πºaîí├

▌.»δ The parameter is incorrect.

        333,948,754 Åô␦╖w6ùƒ.x▐

The parameter is incorrect. j]j.╥QwDIR> Φπ═ The parameter is incorrect.

     <DIR>          ╒0q≡ó,.@{¥
            660 File(s) 2,708,943,115,907 bytes
            664 Dir(s)  455,496,040,448 bytes free

What is the best way to clean this up?

When I try to switch profiles, I get the following error: An unexpected error has prevented your changes from being saved. I have been messing around with this on and off for a couple of months. I uninstalled Thunderbird and re-installed with no luck. This error is not allowing me to switch to a profile that I have had for over 20 years and I have lost all my Local Folders, quite disturbing. I found a similar thread here, but no solution. Thanks, Paul

If I open a second tab on the screen it says the connection has crashed and keeps doing it if you try again. If you reset it resets Firefox including the other tab.

I sent a message a while back about slowness with 115, which I had to download because I had a crash.

There were various suggestions, but no solutions to the excessive slowness with 115. This culminated to day in a long 'no reply' mail which suggested the issue might be the virus checker.....

I checked again the various messages about 115 - most were archived, only one month since they were posted!!

Is there an issue with 115?? I saw a thread which asked was I having issues with it, my answer is yes, is there nobody out there with a suggestion??

Out of nowhere, the browser stopped when I was browsing and the pages started showing slowness. 👇🏻👇🏻👇🏻

c11-9c7f-1ce62d5e295d java.lang.IllegalArgumentException: Cannot round NaN value.

* New Sentry Instance: https://sentry.io/organizations/mozilla/issues/?project=6375561&query=7a6abefc7b3e4a31a088370e3b936c48
* Socorro: https://crash-stats.mozilla.org/report/index/bp-242b35e4-0f2d-4ecd-baba-facad0240527

java.lang.IllegalArgumentException: Cannot round NaN value. at kotlin.math.MathKt__MathJVMKt.roundToInt(MathJVM.kt:4) at androidx.compose.foundation.layout.RowColumnMeasurementHelper.measureWithoutPlacing-_EkL_-Y(RowColumnMeasurementHelper.kt:284) at androidx.compose.foundation.layout.RowColumnMeasurePolicy.measure-3p2s80s(RowColumnImpl.kt:45) at androidx.compose.ui.node.InnerNodeCoordinator.measure-BRTryo0(InnerNodeCoordinator.kt:39) at androidx.compose.foundation.layout.FillNode.measure-3p2s80s(Size.kt:101) at androidx.compose.ui.node.LayoutModifierNodeCoordinator.measure-BRTryo0(LayoutModifierNodeCoordinator.kt:15) at androidx.compose.ui.node.LayoutNodeLayoutDelegate$performMeasureBlock$1.invoke(LayoutNodeLayoutDelegate.kt:9) at androidx.compose.runtime.snapshots.Snapshot$Companion.observe(Snapshot.kt:60) at androidx.compose.runtime.snapshots.SnapshotStateObserver$ObservedScopeMap.observe(SnapshotStateObserver.kt:48) at androidx.compose.runtime.snapshots.SnapshotStateObserver.observeReads(SnapshotStateObserver.kt:154) at androidx.compose.ui.node.OwnerSnapshotObserver.observeReads$ui_release(OwnerSnapshotObserver.kt:3) at androidx.compose.ui.node.LayoutNodeLayoutDelegate$MeasurePassDelegate.remeasure-BRTryo0(LayoutNodeLayoutDelegate.kt:108) at androidx.compose.ui.node.LayoutNodeLayoutDelegate$MeasurePassDelegate.measure-BRTryo0(LayoutNodeLayoutDelegate.kt:104) at androidx.compose.foundation.layout.RowColumnMeasurementHelper.measureWithoutPlacing-_EkL_-Y(RowColumnMeasurementHelper.kt:116) at androidx.compose.foundation.layout.RowColumnMeasurePolicy.measure-3p2s80s(RowColumnImpl.kt:45) at androidx.compose.ui.node.InnerNodeCoordinator.measure-BRTryo0(InnerNodeCoordinator.kt:39) at androidx.compose.ui.node.LayoutNodeLayoutDelegate$performMeasureBlock$1.invoke(LayoutNodeLayoutDelegate.kt:9) at androidx.compose.runtime.snapshots.Snapshot$Companion.observe(Snapshot.kt:60) at androidx.compose.runtime.snapshots.SnapshotStateObserver$ObservedScopeMap.observe(SnapshotStateObserver.kt:48) at androidx.compose.runtime.snapshots.SnapshotStateObserver.observeReads(SnapshotStateObserver.kt:154) at androidx.compose.ui.node.OwnerSnapshotObserver.observeReads$ui_release(OwnerSnapshotObserver.kt:3) at androidx.compose.ui.node.LayoutNodeLayoutDelegate$MeasurePassDelegate.remeasure-BRTryo0(LayoutNodeLayoutDelegate.kt:108) at androidx.compose.ui.node.LayoutNodeLayoutDelegate$MeasurePassDelegate.measure-BRTryo0(LayoutNodeLayoutDelegate.kt:104) at androidx.compose.ui.layout.RootMeasurePolicy.measure-3p2s80s(RootMeasurePolicy.kt:39) at androidx.compose.ui.node.InnerNodeCoordinator.measure-BRTryo0(InnerNodeCoordinator.kt:39) at androidx.compose.ui.node.LayoutNodeLayoutDelegate$performMeasureBlock$1.invoke(LayoutNodeLayoutDelegate.kt:9) at androidx.compose.runtime.snapshots.Snapshot$Companion.observe(Snapshot.kt:60) at androidx.compose.runtime.snapshots.SnapshotStateObserver$ObservedScopeMap.observe(SnapshotStateObserver.kt:48) at androidx.compose.runtime.snapshots.SnapshotStateObserver.observeReads(SnapshotStateObserver.kt:154) at androidx.compose.ui.node.OwnerSnapshotObserver.observeReads$ui_release(OwnerSnapshotObserver.kt:3) at androidx.compose.ui.node.LayoutNodeLayoutDelegate$MeasurePassDelegate.remeasure-BRTryo0(LayoutNodeLayoutDelegate.kt:108) at androidx.compose.ui.node.LayoutNode.remeasure-_Sx5XlM$ui_release(LayoutNode.kt:18) at androidx.compose.ui.node.MeasureAndLayoutDelegate.doRemeasure-sdFAvZA(MeasureAndLayoutDelegate.kt:3) at androidx.compose.ui.node.MeasureAndLayoutDelegate.remeasureOnly(MeasureAndLayoutDelegate.kt:18) at androidx.compose.ui.node.MeasureAndLayoutDelegate.measureOnly(MeasureAndLayoutDelegate.kt:59) at androidx.compose.ui.platform.AndroidComposeView.onMeasure(AndroidComposeView.android.kt:83) at android.view.View.measure(View.java:26415) at androidx.compose.ui.platform.AbstractComposeView.internalOnMeasure$ui_release(ComposeView.android.kt:64) at androidx.compose.ui.platform.AbstractComposeView.onMeasure(ComposeView.android.kt:4) at android.view.View.measure(View.java:26415) at androidx.recyclerview.widget.RecyclerView$LayoutManager.measureChildWithMargins(RecyclerView.java:89) at androidx.recyclerview.widget.LinearLayoutManager.layoutChunk(LinearLayoutManager.java:60) at androidx.recyclerview.widget.LinearLayoutManager.fill(LinearLayoutManager.java:49) at androidx.recyclerview.widget.LinearLayoutManager.onLayoutChildren(LinearLayoutManager.java:800) at androidx.recyclerview.widget.RecyclerView.dispatchLayoutStep2(RecyclerView.java:61) at androidx.recyclerview.widget.RecyclerView.onMeasure(RecyclerView.java:64) at android.view.View.measure(View.java:26415) at android.view.ViewGroup.measureChildWithMargins(ViewGroup.java:7845) at androidx.coordinatorlayout.widget.CoordinatorLayout.onMeasureChild(CoordinatorLayout.java:7) at com.google.android.material.appbar.HeaderScrollingViewBehavior.onMeasureChild(HeaderScrollingViewBehavior.java:93) at androidx.coordinatorlayout.widget.CoordinatorLayout.onMeasure(CoordinatorLayout.java:391) at android.view.View.measure(View.java:26415) at android.view.ViewGroup.measureChildWithMargins(ViewGroup.java:7845) at android.widget.FrameLayout.onMeasure(FrameLayout.java:194) at android.view.View.measure(View.java:26415) at android.view.ViewGroup.measureChildWithMargins(ViewGroup.java:7845) at android.widget.FrameLayout.onMeasure(FrameLayout.java:194) at android.view.View.measure(View.java:26415) at android.view.ViewGroup.measureChildWithMargins(ViewGroup.java:7845) at android.widget.LinearLayout.measureChildBeforeLayout(LinearLayout.java:1552) at android.widget.LinearLayout.measureVertical(LinearLayout.java:842) at android.widget.LinearLayout.onMeasure(LinearLayout.java:721) at org.mozilla.fenix.perf.HomeActivityRootLinearLayout.onMeasure(HomeActivityRootLinearLayout.kt:11) at android.view.View.measure(View.java:26415) at android.view.ViewGroup.measureChildWithMargins(ViewGroup.java:7845) at android.widget.FrameLayout.onMeasure(FrameLayout.java:194) at android.view.View.measure(View.java:26415) at android.view.ViewGroup.measureChildWithMargins(ViewGroup.java:7845) at android.widget.FrameLayout.onMeasure(FrameLayout.java:194) at androidx.appcompat.widget.ContentFrameLayout.onMeasure(ContentFrameLayout.java:160) at android.view.View.measure(View.java:26415) at android.view.ViewGroup.measureChildWithMargins(ViewGroup.java:7845) at android.widget.LinearLayout.measureChildBeforeLayout(LinearLayout.java:1552) at android.widget.LinearLayout.measureVertical(LinearLayout.java:842) at android.widget.LinearLayout.onMeasure(LinearLayout.java:721) at android.view.View.measure(View.java:26415) at android.view.ViewGroup.measureChildWithMargins(ViewGroup.java:7845) at android.widget.FrameLayout.onMeasure(FrameLayout.java:194) at android.view.View.measure(View.java:26415) at android.view.ViewGroup.measureChildWithMargins(ViewGroup.java:7845) at android.widget.LinearLayout.measureChildBeforeLayout(LinearLayout.java:1552) at android.widget.LinearLayout.measureVertical(LinearLayout.java:842) at android.widget.LinearLayout.onMeasure(LinearLayout.java:721) at android.view.View.measure(View.java:26415) at android.view.ViewGroup.measureChildWithMargins(ViewGroup.java:7845) at android.widget.FrameLayout.onMeasure(FrameLayout.java:194) at com.android.internal.policy.DecorView.onMeasure(DecorView.java:1003) at android.view.View.measure(View.java:26415) at android.view.ViewRootImpl.performMeasure(ViewRootImpl.java:3605) at android.view.ViewRootImpl.measureHierarchy(ViewRootImpl.java:2348) at android.view.ViewRootImpl.performTraversals(ViewRootImpl.java:2640) at android.view.ViewRootImpl.doTraversal(ViewRootImpl.java:2197) at android.view.ViewRootImpl$TraversalRunnable.run(ViewRootImpl.java:8960) at android.view.Choreographer$CallbackRecord.run(Choreographer.java:996) at android.view.Choreographer.doCallbacks(Choreographer.java:794) at android.view.Choreographer.doFrame(Choreographer.java:729) at android.view.Choreographer$FrameDisplayEventReceiver.run(Choreographer.java:981) at android.os.Handler.handleCallback(Handler.java:883) at android.os.Handler.dispatchMessage(Handler.java:100) at android.os.Looper.loop(Looper.java:237) at android.app.ActivityThread.main(ActivityThread.java:7807) at java.lang.reflect.Method.invoke(Native Method) at com.android.internal.os.RuntimeInit$MethodAndArgsCaller.run(RuntimeInit.java:493) at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:1047)

Bonjour, Hello,

I contact you because, even without an adblocker, Youtube is very slow with Firefox navigator. I don't understand why and I don't have this problem with Google Chrome ? Fews years earlier, I never had this problem with slow Youtube when using Firefox Navigator. I don't know if the problem comes from Youtube or Mozilla and I contacted both of them.

Thank you.

Bonjour,

Je vous contacte car, même sans bloqueur de publicité, Youtube est très lent avec le navigateur Firefox. Je ne comprends pas pourquoi et je n'ai pas ce problème avec Google Chrome ? Quelques années plus tôt, je n'avais jamais eu ce problème de lenteur avec Youtube lorsque j'utilisais Firefox Navigator. Je ne sais pas si le problème vient de Youtube ou de Mozilla et je les ai contactés tous les deux.

When I open poges now I see often "Firefox darf diese eingebettete Seite nicht öffnen" maybe similar to "Firefox can't open the imbedded page"

I can't see my own music tracks posted on x.com! That's a kind of fraud! What are you doing? At SAP I have to use Edge on Linux already cause you are doing a very bad job! WTF is going on? Are you doing anything or just breaking things?

As the title says, it is very slow with Ublock Origin. I have refreshed Firefox and without Ublock it obviously works but I would like to keep the extension because it is the only one that works with Youtube Ads right now.

Hi I am having problems with Thunderbird, i’m not sure if it’s to do with a windows 11 update or something else. Thunderbird is not responding also at the start of the ‘not responding’ emails from one of my accounts disappeared and then gradually started to reappear but didn’t get up to date and now just not responding st all. I have tried various things to resolve this, uninstalling and reinstalling Thunderbird, doing this and opening my pc in safe mode, doing this and opening Thunderbird in safe mode. Deleting and reinstalling the latest windows 11 update, reinstalling the latest Thunderbird update. I don’t know what to try next? I read somewhere to delete your profile, after saving it, and getting a new profile but no idea how to do this. Any help appreciated.

I am using Thunderbird version 115.7.0(64-bit).

The Inbox is 15.5 GB in size as shown in the attached image file,Inbox Size.Jpeg.

The Inbox folder is not displayed as the attached image file,Folders.jpeg, indicates.

Please provide me with a solution to this problem.

I have 750mb Claro fiber internet, directly on the cable. I updated Firefox. My internet dropped to 300/340mb. I complained to Claro. They tested by connecting another computer to the cable. It gave 800mb. I installed Chrome. Speed ​​was 900mb. What to do in Firefox to regain speed?