Firefox for Android Community Forum

Hello, I've been having issues with the Firefox app on my Android ever since the most recent update on 4th of July. Whenever I tap the "tabs" button, the tabs viewer opens as always, but if I try to scroll and browse the tab, or if I try to close any of the visible tabs, the whole app crashes. Because of that, I can only switch between tabs by swiping, but it can be annoying if you're used to using many tabs like myself. I have cleared my cache multiple times and it didn't help. I am not too tech-savvy but is there any way to fix it? Thank you!

When using Firefox on Android for a while, attempting to use pinch to zoom on a web site will cause Android to crash, as in the screen will go black, the G logo animation will appear, and I'll be sent back to the lock screen. It's not just the app that crashes. It doesn't seem to be a full reboot as that takes longer and starts with a different animation, but some part of Android is restarting.

It's consistent but not predictable. Pinch to zoom will work on one site fine and then crash on the same site later. It seems to be a resource issue as it's unlikely to happen on a fresh instance and it becomes more likely the longer you've been using Firefox.

This has been happening for several months, since at least July. It's happened both on my old Pixel 6 Pro and my new Pixel 9 Pro. It's happened on both Android 14 and 15.

I eventually found out I could go to Settings > About Firefox > Crashes and get some debugging info, but I don't know what to do with it. I currently have 15 crashes between now and Oct 16th which all say:

java.lang.RuntimeException: Adding window failed

Clicking Share to get more info on the latest one adds:

java.lang.RunetimeException: Adding window failed

at android.view.ViewRootImpl.setView(ViewRootImpl.java:1618)
at android.view.WindowManager.Global.addView(WindowManagerGlobal.java:442)
at android.view.WindowManagerImpl.addView(WindowManagerImpl.java:158)
at android.app.Dialog.show(Dialog.java:352)
[...]

Caused by: android.os.DeadObjectException

at android.os.BinderProxy.transactNative(NativeMethod)
at android.os.BinderProxy.transact(BinderProxy.java:568)
at android.view.IWindowSession$Stub$Proxy.addToDisplayAsUser(IWindowSession.java:1305)
at android.view.ViewRootImpl.setView(ViewRootImpl.java:1596)
... 18 more

I don't know what to do with this info. Should I file a Bugzilla report with just this? The GUID associated with the most recent one is 7a5e5497-bb62-4e3c-94fc-5c63c51d0830. I can't look it up in crash-stats.mozilla.org. Or should I assume all crash reports are automatically received? I'd still like to be able to have a Bugzilla bug to watch for progress.

Steps to reproduce : - go to YouTube - open a video - press the full screen button or tilt the phone sideways to trigger full screen - Firefox crashes and forces back to home screen - if opening Firefox again only half of the video component shows as in portrait mode, rest is black screen - if attempting to go side/full screen does properly show the video, but going back again to normal screen still shows the half black screen

I can reproduce this with a almost 100% rate, it only fixes itself by restarting Firefox, where it will work until phone is put to sleep mode.

I tried reinstalling Firefox from scratch, as well as deleting my browser cache and it didn't fix.

Firefox Android just crashed when opening a bunch of bookmarks and then again every time I wanted to report a crash. I hope someone here can forward this to whoever usually receives the crash reports.

1cb54f1f-11f5-4fa7-9d97-b4bf58d29ac2 java.lang.NullPointerException: Attempt to invoke virtual method 'java.lang.String java.lang.Object.toString()' on a null object reference

java.lang.NullPointerException: Attempt to invoke virtual method 'java.lang.String java.lang.Object.toString()' on a null object reference at java.lang.String.valueOf(String.java:2924) at java.lang.StringBuilder.append(StringBuilder.java:132) at java.lang.Throwable.printEnclosedStackTrace(Throwable.java:709) at java.lang.Throwable.printStackTrace(Throwable.java:674) at java.lang.Throwable.printStackTrace(Throwable.java:735) at mozilla.components.support.base.ext.ThrowableKt.getStacktraceAsString$default(Throwable.kt:19) at mozilla.components.lib.crash.service.MozillaSocorroService.sendCrashData(MozillaSocorroService.kt:607) at mozilla.components.lib.crash.service.MozillaSocorroService.sendReport$lib_crash_release(MozillaSocorroService.kt:285) at mozilla.components.lib.crash.service.MozillaSocorroService.report(MozillaSocorroService.kt:5) at mozilla.components.lib.crash.CrashReporter$submitReport$2.invokeSuspend(CrashReporter.kt:70) at kotlin.coroutines.jvm.internal.BaseContinuationImpl.resumeWith(ContinuationImpl.kt:9) at kotlinx.coroutines.DispatchedTask.run(DispatchedTask.kt:112) at kotlinx.coroutines.internal.LimitedDispatcher$Worker.run(LimitedDispatcher.kt:4) at kotlinx.coroutines.scheduling.TaskImpl.run(Tasks.kt:3) at kotlinx.coroutines.scheduling.CoroutineScheduler$Worker.run(CoroutineScheduler.kt:96) Suppressed: kotlinx.coroutines.internal.DiagnosticCoroutineContextException: [StandaloneCoroutine{Cancelling}@6aec4f8, Dispatchers.IO]

The original bookmarks crash was this:

300e77b6-00e5-458d-ae84-d1202c866a1b java.lang.NullPointerException

* New Sentry Instance: https://sentry.io/organizations/mozilla/issues/?project=6375561&query=9fd75a9f565c460b91e4977064d87e83

java.lang.NullPointerException at org.mozilla.fenix.library.bookmarks.BookmarkFragment.refreshBookmarks(BookmarkFragment.kt:103) at org.mozilla.fenix.library.bookmarks.BookmarkFragment$refreshBookmarks$1.invokeSuspend(BookmarkFragment.kt:14) at kotlin.coroutines.jvm.internal.BaseContinuationImpl.resumeWith(ContinuationImpl.kt:9) at kotlinx.coroutines.DispatchedTask.run(DispatchedTask.kt:112) at android.os.Handler.handleCallback(Handler.java:883) at android.os.Handler.dispatchMessage(Handler.java:100) at android.os.Looper.loop(Looper.java:214) at android.app.ActivityThread.main(ActivityThread.java:7400) at java.lang.reflect.Method.invoke(Native Method) at com.android.internal.os.RuntimeInit$MethodAndArgsCaller.run(RuntimeInit.java:491) at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:935) Suppressed: kotlinx.coroutines.internal.DiagnosticCoroutineContextException: [StandaloneCoroutine{Cancelling}@26f4bf6, Dispatchers.Main]

Listening to audiobooks made me notice this problem, often whilst my phone is turned off and the audiobook is playing in the background on a tab on firefox the audio would just stop and i would find either that firefox was still open but unloaded all the tabs, or that it simply crashed. I thought this was a thing that solely happened when playing audio in the background but then i noticed that it is actually a general problem when firefox is kept open in the background. It doesnt happen after a set amount of time, sometimes it happens immediately, sometimes after like 10 minutes that it is kept in the background. How can i fix this? its very annoying.

When I try to open firefox on my android phone, it just closes and gives me an error message which I have attached a screen shot of.

I do not know if this is related but this happened after I scanned a qr code and tried to open it.

I have un-installed and reinstalled the app and turned my phone off then on again after reinstalling but this did not help.

Pls can you help?

Firefox for Andoird crashes every time tab listing opened. If I do "about:crashes" i see the attached list of crashes ...

"java.lang.IllegalArgumentException..."

Version is 130.0 (Build 2016041319)

I tried clearing cache but it didn't help.

Dear Mozilla support,

For a while I have the problem that when I want to watch a video fullscreen on a website e.g. youtube, inline video etc. Firefox stops and completely closes. This is only the first time when I play the video. When I re-open the browser I can continue watching the video fullscreen without any problem. I don't receive any error messages.

Attached the specs of my phone and Firefox browser.

Kind regards, Rick

Hi! I need help with my firefox, because i started to have a problem yesterday. Everytime i try to go to sertain sites it crashes for no reason! Such as Georgia power, georgia natural gas, and etc....

For the past few weeks builds, downloading image from any website is weirdly triggering a crash of com.android.phone due to which mobile network is lost as well. Using Samsung Galaxy Note9.

1. Open the Firefox for Android application 2. Either browse around first, download something beforehand, or do it right at the start, go to the 'three dot' menu on the top right screen and select the 'Downloads' section. 3. The application will freeze without opening the section and after a while will say 'Firefox not responding' before crashing.

After updating Firefox for Android, my phone started rebooting after downloading any file. This makes it very difficult to use the browser and I had to use Chrome temporarily. The Crashes tab in About Firefox is empty. I tried to collect a logcat and uploaded it to Google Drive (maybe this will help somehow.): https://drive.google.com/file/d/1kmdS5rTH3r0u09KLxeUDeY5U8r5xiEK1/view?usp=sharing. I hope this information is helpful in solving the problem.

Sometimes when I click full-screen on a video, the app view disappears, and I am back out on the home screen. I still hear the video, and can switch back to Firefox and try full-screen again. It usually (maybe always) works the second time.

When it happens, I can briefly see the video go full-screen and rotate to landscape. When the view has disappeared the screen rotates back to portrait. Whenever a video stays in portrait mode when going full-screen, the problem does not occur.

Even when closing firefox, I can still hear the video. So I think it is related to this issue: [https://support.mozilla.org/en-US/que.../1420245]

What I have tried:

• Switching versions of firefox, they all have the same issue; Firefox, Firefox Nightly, and Fennec.

• Clearing cache and disabling add-ons has not worked, but seemed to make it happen less frequently for a while (not sure).

• I tried activating automatic screen rotation, but this made the problem worse. It would then not work the second time and firefox would only display part of the website in the top right corner of the screen. Closing it and re-opening it multiple times did not work. I had to turn auto-rotate back off.

• I'm using the KISS launcher. Tried switching to various other launchers, but it made no difference.

OS: Calyx OS 4.12 HW: FairPhone 4 Firefox: Fennec v116, Firefox Nightly Add-ons: uBlock Origin, Tampermonkey

Hi support team,

I was using Mozilla Firefox on my Samsung Galaxy s20+ without any issues. I have transferred all data from my old one to new one, Samsung Galaxy S24 after this migration Mozilla Firefox crashes, when I was forwarded from an app.

Standard browser: Mozilla Firefox I have already reinstalled the Mozilla. This action works properly with other browsers.

Kind regards Mustafa

About a week ago my phone (Sony Xperia ZX2 Premium running Android 10) started 'crashing to the lock screen' whenever a download finished in the mobile version of Firefox. If multiple files are downloaded in short succession a popup will appear informing me that the 'System UI keeps stopping', with a prompt to close the app or to get to the app info (see the attached photo - clicking either option sends me back to the lockscreen, with the only difference being that after unlocking the phone the former will have stayed with Firefox in focus, and the latter having opened the Settings app on the System UI entry).

Going to about:crashes shows no recent crashes on Firefox's ends. (Plus, Firefox shows no signs of having been closed [like tabs being reloaded] after unlocking the phone again post-crash). The issue currently only happens when downloading a file through Firefox; downloading a file through Edge, Discord, or the Google Drive app produces no problems.

I have already tried force-stopping and restarting Firefox, restarting the phone, and clearing the download history with no luck. Furthermore, I have also checked for updates for the system, the Google Play Store, and Firefox for Android, however all of them were already up to date.

Any help would be sincerely appreciated.

firefox is crashing when i try to download some file. I gotta clear the app's data for it to work normally again, but this always happens when I try to download it again, also, the browser doesn't open after it crashes, only after I clear its data.

Firefox for Android version 119.0.1 Android 11 (64 bits)

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)

when i have more than 10 pages open the app starts crashing, won't let me go back as well and sometimes just reloads. There were also situations in which he grabbed me without me doing anything. I have about 4-5 extensions (in the photo). I'm using Samsung Galaxy S24, my previous was A52 (I had no problem with it)