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I wanted to use the new VPN feature and the icon initially showed up in the top right, but it has disappeared and is not present in "customise toolbar" or privacy settings either.

I used to be able to clink on an image link prior to a Firefox update (I don't know which one) to go to that site. Firefox gives me that it cannot find the server. What can I do to correct this problem?

Hello. Yesterday, I deleted all the stored login information, such as cookies. Latter, I tried to make login, I filled my name and password. As usual, Facebook refuses to login, giving me a choice of extra steps necessary. I chosen to receive a security code on my e-mail. I copy and pasted it on the suitable place and click on the button to proceed.

That's when things stop working. It usually it works as expected, but now it just return to the login page, nothing filled. Bellow, an apparently relevant info the shows on browser console:

"ErrorUtils caught an error:

_.getClientCapabilities is not a function [Caught in: Passkey authentication failed during visibility callback]

Subsequent non-fatal errors won't be logged; see https://fburl.com/debugjs. Object { column: "1421", clientTime: 1774704924, extra: {}, guardList: [], hash: "ukkpfs", isNormalizedError: true, line: "86", loggingSource: "FBLOGGER", message: "_.getClientCapabilities is not a function [Caught in: Passkey authentication failed during visibility callback]", messageFormat: "_.getClientCapabilities is not a function [Caught in: Passkey authentication failed during visibility callback]", … } D_9oglqPD5n.js:79:56"

Windows11，firefox版本149.0，增强型跟踪保护设置为标准，基于 HTTPS 的 DNS”启用策略为默认保护，扩展全关。在我打开www.douyin.com的标签页时，通常要加载5秒钟甚至10秒钟，视频才会播放（如图）。作为对比，我在edge浏览器上登陆了同一个抖音账号，打开同样的书签页面，edge并未出现明显加载画面，在chrome上打开未登陆的抖音标签页也未出现明显加载画面。这个情况也许是从近期firefox自动更新后出现的？请问如何解决

I have been using virtualrailfan.com but recently have experienced non operation of the app. Using another browser does not have this difficulty. The site starts OK but going to a sub-site, it refuses to start Virtualrailfan says it is a problem on my end and the fact that another browser works, confirms this fact. They initially said zoom was the problem but changing that in the browser didn't work. Please help

When ever I am trying to look for some image or search some thing and when I scroll down a black bar appear on the lower side of my browser at first I thought its just log but over the time I think its some kind of bugs, because I try both of the page I visit on firefox, firefox beta, and firefox nightly, beta & nightly dont seems to be a problem to some of the page I visited its must be the official firefox apps... even tho I still love firefox its one of the browser i feel I am free to use and a browser that I choice not force to use, so mozilla keep up the good work hope you able to fix some bugs fast 😁😁

When the browser is open - whether with tabs or not - it disables NVIDIA ShadowPlay. The NVIDIA overlay says “a protected app is preventing desktop capture,” and I’d agree with that if it only happened when tabs with DRM content were open, but it happens even in an empty browser.

I have "Always ask you where to save files" checked but when I save a file I don't get asked where to save the file and it's going into Downloads. I didn't have this issue before. Something isn't working right since the last few updates.

Pat

When attempting to reverse-image search an image, Google Image Search replaces the image with a blank white image.

Steps taken: Verified resistFingerprinting is false. Enabled it, got the usual colored crosshatch image. Disabled, got white box. Tested with PhotoPea (works just fine there). Tested with Chrome (works just fine there). Disabled ETP and generic tracking protections. Tested in private window (nope). Pasting to MSPaint, worked. Saving as an image file and trying to upload that way, nope.

Open to trying more things.

146.0.1 (64-bit) Windows 10 Version 10.0.19045 Build 19045 Addons that may have caused issues: UBlock Origin TamperMonkey Disabled both, same results.

Hello,

I've noticed that recently that Firefox seems to repeatedly crash on my Xiaomi phone quite frequently. It's a Xiaomi 15 Pro on HyperOS 3.0.7.0, and here are some of the crash reports:

cde527a0-cc83-48d3-903f-951ad3d8e7e1 java.lang.OutOfMemoryError: Failed to allocate a 113430304 byte allocation with 33554432 free bytes and 97MB until OOM, target footprint 199480736, growth limit 268435456

java.lang.OutOfMemoryError: Failed to allocate a 113430304 byte allocation with 33554432 free bytes and 97MB until OOM, target footprint 199480736, growth limit 268435456

   at java.util.Arrays.copyOf(Arrays.java:3785)
   at java.io.ByteArrayOutputStream.toByteArray(ByteArrayOutputStream.java:211)
   at kotlin.io.ByteStreamsKt.readBytes(IOStreams.kt:24)
   at mozilla.components.support.images.compose.loader.ImageLoaderKt$fetchAndDecode$2.invokeSuspend(ImageLoader.kt:70)
   at mozilla.components.support.images.compose.loader.ImageLoaderKt$fetchAndDecode$2.invoke(ImageLoader.kt:13)
   at kotlinx.coroutines.intrinsics.UndispatchedKt.startUndspatched(Undispatched.kt:19)
   at kotlinx.coroutines.BuildersKt.withContext(Unknown Source:78)
   at mozilla.components.support.images.compose.loader.ImageLoaderKt$load$bitmap$1.invokeSuspend(ImageLoader.kt:53)
   at kotlin.coroutines.jvm.internal.BaseContinuationImpl.resumeWith(ContinuationImpl.kt:9)
   at kotlinx.coroutines.DispatchedTask.run(DispatchedTask.kt:122)
   at kotlinx.coroutines.internal.LimitedDispatcher$Worker.run(LimitedDispatcher.kt:4)
   at kotlinx.coroutines.scheduling.TaskImpl.run(Tasks.kt:3)
   at kotlinx.coroutines.scheduling.CoroutineScheduler$Worker.run(CoroutineScheduler.kt:94)
   Suppressed: kotlinx.coroutines.internal.DiagnosticCoroutineContextException: [androidx.compose.ui.platform.MotionDurationScaleImpl@bf8206, androidx.compose.runtime.BroadcastFrameClock@1cc60c7, StandaloneCoroutine{Cancelling}@a6c06f4, AndroidUiDispatcher@ed57e1d]

e0d3fa76-8868-48e4-8d6e-f66671ba8b50 java.lang.OutOfMemoryError: Failed to allocate a 134217744 byte allocation with 33554432 free bytes and 120MB until OOM, target footprint 176034208, growth limit 268435456

java.lang.OutOfMemoryError: Failed to allocate a 134217744 byte allocation with 33554432 free bytes and 120MB until OOM, target footprint 176034208, growth limit 268435456

   at java.util.Arrays.copyOf(Arrays.java:3785)
   at java.io.ByteArrayOutputStream.grow(ByteArrayOutputStream.java:120)
   at java.io.ByteArrayOutputStream.ensureCapacity(ByteArrayOutputStream.java:95)
   at java.io.ByteArrayOutputStream.write(ByteArrayOutputStream.java:156)
   at kotlin.io.ByteStreamsKt.copyTo(IOStreams.kt:19)
   at kotlin.io.ByteStreamsKt.readBytes(IOStreams.kt:21)
   at mozilla.components.support.images.compose.loader.ImageLoaderKt$fetchAndDecode$2.invokeSuspend(ImageLoader.kt:70)
   at mozilla.components.support.images.compose.loader.ImageLoaderKt$fetchAndDecode$2.invoke(ImageLoader.kt:13)
   at kotlinx.coroutines.intrinsics.UndispatchedKt.startUndspatched(Undispatched.kt:19)
   at kotlinx.coroutines.BuildersKt.withContext(Unknown Source:78)
   at mozilla.components.support.images.compose.loader.ImageLoaderKt$load$bitmap$1.invokeSuspend(ImageLoader.kt:53)
   at kotlin.coroutines.jvm.internal.BaseContinuationImpl.resumeWith(ContinuationImpl.kt:9)
   at kotlinx.coroutines.DispatchedTask.run(DispatchedTask.kt:122)
   at kotlinx.coroutines.internal.LimitedDispatcher$Worker.run(LimitedDispatcher.kt:4)
   at kotlinx.coroutines.scheduling.TaskImpl.run(Tasks.kt:3)
   at kotlinx.coroutines.scheduling.CoroutineScheduler$Worker.run(CoroutineScheduler.kt:94)
   Suppressed: kotlinx.coroutines.internal.DiagnosticCoroutineContextException: [androidx.compose.ui.platform.MotionDurationScaleImpl@f557b89, androidx.compose.runtime.BroadcastFrameClock@7ff878e, StandaloneCoroutine{Cancelling}@8ee2baf, AndroidUiDispatcher@7121bbc]

94125fa2-317a-47de-a689-dc7d3fa5f15e java.lang.OutOfMemoryError: Failed to allocate a 134217744 byte allocation with 31855720 free bytes and 30MB until OOM, target footprint 268435456, growth limit 268435456

java.lang.OutOfMemoryError: Failed to allocate a 134217744 byte allocation with 31855720 free bytes and 30MB until OOM, target footprint 268435456, growth limit 268435456

   at java.util.Arrays.copyOf(Arrays.java:3785)
   at java.io.ByteArrayOutputStream.grow(ByteArrayOutputStream.java:120)
   at java.io.ByteArrayOutputStream.ensureCapacity(ByteArrayOutputStream.java:95)
   at java.io.ByteArrayOutputStream.write(ByteArrayOutputStream.java:156)
   at kotlin.io.ByteStreamsKt.copyTo(IOStreams.kt:19)
   at kotlin.io.ByteStreamsKt.readBytes(IOStreams.kt:21)
   at mozilla.components.support.images.compose.loader.ImageLoaderKt$fetchAndDecode$2.invokeSuspend(ImageLoader.kt:70)
   at mozilla.components.support.images.compose.loader.ImageLoaderKt$fetchAndDecode$2.invoke(ImageLoader.kt:13)
   at kotlinx.coroutines.intrinsics.UndispatchedKt.startUndspatched(Undispatched.kt:19)
   at kotlinx.coroutines.BuildersKt.withContext(Unknown Source:78)
   at mozilla.components.support.images.compose.loader.ImageLoaderKt$load$bitmap$1.invokeSuspend(ImageLoader.kt:53)
   at kotlin.coroutines.jvm.internal.BaseContinuationImpl.resumeWith(ContinuationImpl.kt:9)
   at kotlinx.coroutines.DispatchedTask.run(DispatchedTask.kt:122)
   at kotlinx.coroutines.internal.LimitedDispatcher$Worker.run(LimitedDispatcher.kt:4)
   at kotlinx.coroutines.scheduling.TaskImpl.run(Tasks.kt:3)
   at kotlinx.coroutines.scheduling.CoroutineScheduler$Worker.run(CoroutineScheduler.kt:94)
   Suppressed: kotlinx.coroutines.internal.DiagnosticCoroutineContextException: [androidx.compose.ui.platform.MotionDurationScaleImpl@5cc155a, androidx.compose.runtime.BroadcastFrameClock@402b38b, StandaloneCoroutine{Cancelling}@5cfc68, AndroidUiDispatcher@cef5881]

   c31407a8-aa18-4415-839b-a5323a693c3d
   java.lang.OutOfMemoryError: Failed to allocate a 134217744 byte allocation with 57411112 free bytes and 54MB until OOM, target footprint 268435456, growth limit 268435456
   ----
   java.lang.OutOfMemoryError: Failed to allocate a 134217744 byte allocation with 57411112 free bytes and 54MB until OOM, target footprint 268435456, growth limit 268435456
       at java.util.Arrays.copyOf(Arrays.java:3785)
       at java.io.ByteArrayOutputStream.grow(ByteArrayOutputStream.java:120)
       at java.io.ByteArrayOutputStream.ensureCapacity(ByteArrayOutputStream.java:95)
       at java.io.ByteArrayOutputStream.write(ByteArrayOutputStream.java:156)
       at kotlin.io.ByteStreamsKt.copyTo(IOStreams.kt:19)
       at kotlin.io.ByteStreamsKt.readBytes(IOStreams.kt:21)
       at mozilla.components.support.images.compose.loader.ImageLoaderKt$fetchAndDecode$2.invokeSuspend(ImageLoader.kt:70)
       at mozilla.components.support.images.compose.loader.ImageLoaderKt$fetchAndDecode$2.invoke(ImageLoader.kt:13)
       at kotlinx.coroutines.intrinsics.UndispatchedKt.startUndspatched(Undispatched.kt:19)
       at kotlinx.coroutines.BuildersKt.withContext(Unknown Source:78)
       at mozilla.components.support.images.compose.loader.ImageLoaderKt$load$bitmap$1.invokeSuspend(ImageLoader.kt:53)
       at kotlin.coroutines.jvm.internal.BaseContinuationImpl.resumeWith(ContinuationImpl.kt:9)
       at kotlinx.coroutines.DispatchedTask.run(DispatchedTask.kt:122)
       at kotlinx.coroutines.internal.LimitedDispatcher$Worker.run(LimitedDispatcher.kt:4)
       at kotlinx.coroutines.scheduling.TaskImpl.run(Tasks.kt:3)
       at kotlinx.coroutines.scheduling.CoroutineScheduler$Worker.run(CoroutineScheduler.kt:94)
       Suppressed: kotlinx.coroutines.internal.DiagnosticCoroutineContextException: [androidx.compose.ui.platform.MotionDurationScaleImpl@46e4c17, androidx.compose.runtime.BroadcastFrameClock@eef9804, StandaloneCoroutine{Cancelling}@36d21ed, AndroidUiDispatcher@1bd822]

A very bad error has been going on for a while now. The browser no longer behaves correctly when using Google Search. For example, you search for "flowers." Then you search for something else, such as "cars." You open one of the car images from the search results. When you tap the back button or the X-button to close the image, Firefox jumps back to the previous search ("flowers") instead of returning to the car image results. It should return to the car results, not the earlier search!

Latest version(s) of Firefox on my Android 16 Samsung Galaxy 25 Ultra are not happy - go to open a new tab and the entire app freezes - after about 10s I get offered the option of waiting - which does nothing, the same message reappears again 10s later - or closing the app.

Have been trying to find resolution as Firefox is my browser of choice but nothing so far besides reverting to an old build of around 140 and refusing to upgrade.

Please can this be looked at as a priority - reading up I believe a number of Samsung users are experiencing problems with the newer versions all focussed around the tab system.

I’ve been troubleshooting a strange networking issue in Firefox that I haven’t been able to pin down, and it seems to be specific to Firefox’s network stack rather than my system or connection.

On several high-traffic sites that sit behind Cloudflare (Discord, Shopify storefronts, some SaaS dashboards), Firefox occasionally stalls during page load. The request shows up in the Network panel as pending for several seconds before finally completing. Sometimes the page partially renders and then hangs until the stalled requests finish.

A few things that make this confusing:

• The same sites load instantly in Chromium-based browsers on the same machine and network • The issue persists even in Firefox Troubleshoot Mode with extensions disabled • DNS over HTTPS on/off does not appear to change behavior • Packet captures show the TCP connection is established quickly, but some HTTP/2 streams appear to wait before data begins flowing • If I force HTTP/1.1 using a proxy for testing, the issue disappears

System details:

OS: Windows 11 Firefox: latest stable release Connection: fiber, low latency, no packet loss locally No system proxy configured

Things I’ve already tried:

• Clearing cache and site data • New Firefox profile • Disabling hardware acceleration • Testing with network.http.http2.enabled toggled • Comparing HAR logs with Chromium

One thing I noticed in the Firefox networking logs is that multiplexed streams sometimes wait behind earlier streams longer than expected, almost like there’s some internal prioritization or queue behavior happening. I’m wondering whether this could be related to HTTP/2 prioritization logic, connection coalescing, or how Firefox handles Cloudflare edge endpoints.

Has anyone seen similar behavior or knows whether there are any advanced networking prefs in about:config worth experimenting with (connection limits, HTTP/2 concurrency, etc.)?

Curious if this might be a known quirk with certain CDNs or just something unique to my environment.