Firefox for Android Community Forum

Hi,

I’ve noticed that Firefox on my Android phone becomes noticeably slow whenever I open certain video or streaming pages. The browser doesn’t crash, but the page takes a long time to respond, and scrolling becomes choppy until the video fully loads.

I’ve tried clearing the cache, disabling add-ons, and testing on both Wi-Fi and mobile data. The issue only seems to happen on Firefox — the same sites load smoothly on other browsers.

Is this a known performance limitation, or is there something in the settings I should adjust? I’m not sure if it’s related to media decoding or just heavy websites.

Thanks for any guidance.

Hello. Although I have configured the page translation settings, the pages are not automatically translated. It may be possible with the help of Please help me solve this problem.

Hi there. i have here one chinese tablet and i want to install it firefox but cannot login to Google Play store because i see error for the browser. i want install it firefox and set firefox as default so i can log into Google play store.

thanks in advance

On a 15" tablet, it would be nice to see the imap folders permanently, so i could drag emails to them. Im a librarian and i like to have a nice structured subject ordered inbox. But i cant find any ways to fix the folders list to the left side..

I have been trying to solve this lingering problem where I would like to turn off the zoom in when I activate a text input box.

I found some folks mentioning I could toggle this in about:config only to find that it does not save upon refresh.

The next option it looked like was to edit about:studies or about:profiles but I am unable to access those the same way I can access about:config

I'm using Firefox Nightly on an Android 15 device. Any help would be greatly appreciated!

I have an s25 Ultra and everyrhing was working fine with firefox but within the span of an hour, I would do a search and any search engine I was use (I usually use Duck Duck Go) would make the font very small rather than use the Automatic font sizing option. It seems to have turned off on its own even when showing as active. What could be causing this and how to make the text fit to screen again?

Like most crossword sites, only the active word is supposed to be highlighted. Starting late on 11/19, the highlighting has gone haywire. I have attached an image.

Maybe it deselects when the focus shifts, maybe it doesn't. Maybe it shows which square is active, maybe it doesn't. Eventually, I back up a page and then return, which clears the highlighting but not the words.

I've tried actually quitting Firefox and restarting, but it didn't help.

Thank you for any help!

Hi there,

Firefox desktop and Fennec Android are syncing everything perfectly, including tabs from Fennec in Firefeox, except for when I try to view tabs from Firefox in Fennec I get the message: "You don't have any tabs open in Fennec on your other devices".

I have tried to figure out what's causing this and have searched for answers but I can't figure it out. Could anyone suggest what the problem might be please. Appologoes if this is something obvious I've just missed.

Many thanks,

Have be3n hav8ng this problem for at least a week, on a Samsung Galaxy Tab A 8 with Android 14 (One UI). About 20cto 30 seconds after launch, the browser abruptly closes back to the home screen. Have tried resetting the tablet, clearing some old apps out, etc., but thr problem persists.

I have dumped the latest Mozilla Crash Report from my browser. Apparently, there is an issue with memory:

cf13ba46-8115-4130-8396-249e2c218304 java.lang.OutOfMemoryError: Failed to allocate a 134217744 byte allocation with 50331648 free bytes and 116MB until OOM, target footprint 129110320, growth limit 201326592

java.lang.OutOfMemoryError: Failed to allocate a 134217744 byte allocation with 50331648 free bytes and 116MB until OOM, target footprint 129110320, growth limit 201326592 at java.util.Arrays.copyOf(Arrays.java:3578) 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.appservices.httpconfig.FetchBackend.sendRequest$lambda$3(FetchBackend.kt:6) at mozilla.appservices.httpconfig.FetchBackend.sendRequest(FetchBackend.kt:274) at mozilla.appservices.viaduct.uniffiCallbackInterfaceBackend$sendRequest$callback$makeCall$1.invokeSuspend(viaduct.kt:49) at mozilla.appservices.viaduct.uniffiCallbackInterfaceBackend$sendRequest$callback$makeCall$1.invoke(viaduct.kt:2) at mozilla.appservices.viaduct.uniffiCallbackInterfaceBackend$sendRequest$callback$makeCall$1.invoke(viaduct.kt:1) at mozilla.appservices.viaduct.uniffiCallbackInterfaceBackend$sendRequest$callback$$inlined$uniffiTraitInterfaceCallAsyncWithError$1.invokeSuspend(viaduct.kt:31) at kotlin.coroutines.jvm.internal.BaseContinuationImpl.resumeWith(ContinuationImpl.kt:9) at kotlinx.coroutines.DispatchedTask.run(DispatchedTask.kt:122) at kotlinx.coroutines.scheduling.CoroutineScheduler$Worker.run(CoroutineScheduler.kt:127) Suppressed: kotlinx.coroutines.internal.DiagnosticCoroutineContextException: [StandaloneCoroutine{Cancelling}@e36b064, Dispatchers.Default]

Can SOMEONE help me figure this out, what should I do, etc.? I am going crazy fighting this..

I’m using a decent mid-range phone, and I usually keep only two apps in the recent apps list and a single tab open in Firefox. But every time I switch from Firefox to another app... like the gallery or file manager to upload a file or attach a PDF... the Firefox tab reloads when I come back. This completely resets whatever I was doing on the site, which is extremely frustrating.

The browser feels too memory-hungry and poorly optimized, even when I’m using just one tab. At this point, I’m honestly considering uninstalling Firefox and switching to a different browser, even though I’ve been using Firefox as my default on both Windows and Android for years. I really don’t like the Chromium-based alternatives, but it feels like my hands are tied.