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I have a new MacBook Pro M5, with MacOS Tahoe Version 26.5.2, and currently running Firefox 153.0. Over the past few days, I've noticed that the Fn-Delete (forward delete) is not working in the file name field when downloading a file from the internet. Fn-Delete is working everywhere else.

I'm not certain if this started when I set up the new computer, updated the MacOS or updated Firefox. I'm pretty sure all have occurred within the past couple weeks.

Thanks.

Hello! Since the latest update to Firefox (153, I believe) my Firefox has not worked. It starts up perfectly fine, but quickly freezes, becomes non-responsive, and needs to be closed. No matter how many times I attempt to open it, the same thing occurs. There’s been been occasions where it hasn’t frozen immediately so I have been able to turn off hardware acceleration as well as remove my theme and disable all my add-ons/extensions, but this has done nothing. Creating a new profile does not help, nor does trying Safe Mode: the same thing happens no matter what. I tried to reinstall the update, but this also did nothing. I haven’t yet tried to uninstall & reinstall or do a Firefox refresh as those are my last resorts and I won’t do them unless I’m sure they’ll make a difference. I haven’t downloaded any new extensions recently, and this only started happening after the most recent update. I’m not sure what else I can try at this point, and am very frustrated.

For example, if one moves their mouse button close to the bottom edge of their browser window, holds down the left mouse button then drags the mouse further down to the edge of the browser window, it will begin to scroll downward. The same thing happens on the right edge of the window if there's a horizontal scroll bar for the page.

Does anyone know of a way to disable this? Is there something in about:config maybe? Thanks.

It is as if Firefox has disappeared from my desktop. I click on the shortcut but nothing happens. It was working fine last night. I have tried uninstalling/reinstalling but still nothing. A window does not even appear.

Question is all there is, why does Firefox 153.0 x64 CRASH COMPLETELY and Windows 11 x64 "App Crash Reporting" is automatically invoked, 3 out of 4 times a simple "History - Clear History - Clear Everything" function is implemented??

Thanks,

OH1943

Using iMac with M3 chip. Latest system software: Version 26.5.2 (25F84). On latest Firefox update.

I am no longer able to log in to my bank using the Firefox browser, BUT am able to log in using the Apple environment...ie Safari, and iOS. I'm a longtime customer/consumer of both Firefox and the bank, and this is the first time I've been unable to log in. I prefer Firefox over Safari, but my bank was recommending that I use another browser...like Safari, Chrome...etc. What do you think is the reason for what I would assume is a software compatibility issue? This was the message left on the screen: "Requested URL was rejected."

Any help would be nice to keep me from using Safari...

As of yesterday, I have a message on Inspire.com which says Opt-Out Signal Honored It even says that before I log in. They are checking at their end, can you please help me? This is the only website that I receive this message.

Also, I am receiving more and more pop-ups that say WARNING SECURITY RISK "Be careful. Something doesn’t look right."

"Firefox spotted a potentially serious security issue with tracenep.bidprism.com. Someone pretending to be the site could try to steal things like credit card info, passwords, or emails." Some are websites I use, some are not. I don't remember adding this to my list or changing any of my extension settings. Please Help.

Thank you very much.

I am a TD Bank customer who uses their Bill Pay feature. A recent FireFox update now prevents me from completing my payment sequence. Please alert me how this can be fixed. I like the FireFox browser but will remove it from my computer if no fix is offered. When I use Google Crome I have no problem completing my payment sequence. Thank you.

Bill Gibbons

[redacted email from public]

I have tried safe mode. No joy, but it has shown plain vanilla FF is the issue, not extensions.

(I'm using a different browser to make this report, so Share Data button is of no use here.)

the etrade bill pay summary page submit button will not work. instead displaying a red circle with a line through it. Etrade reports they are unaware of any problems. Last worked on 6/30/26. I tried all the general reccomendations. Have not tried edge yet, but that is my next move. I always use the private browsing setting for Etrade.

I'm blaming the latest Firefox update from a couple of days ago, since this problem only arose yesterday. Now cut off from reading and following news that I really want to receive.

This is what I get when trying to access links within a few of the websites that I regularly access for links to articles it posts:

The site ahead may contain harmful programs

Firefox blocked this page because it might try to trick you into installing programs that harm your browsing experience (for example, by changing your homepage or showing extra ads on sites you visit).

Advisory provided by Google Safe Browsing.

I successfully linked / synced the thunderbird calendar with the iCloud calendar. Calendar entries manually entered in iCloud or iPhone calendar are successfully synced and are visible in the thunderbird mail. The other way round, syncing the existing entries in the Thunderbird calendar does not work. They do not appear in the iCloud or iPhone calendar. Searching the internet, the specific Thunderbird or Apple help-sites did not provide an obvious solution for this problem. I went through all (or nearly all) recommendations given by Apple, no success to sync from Thunderbird to iCloud.

Any suggestion what to modify or adjust

jm

Hi, Check out the attached screenshot. This is the image FF saves when a user does the following action on any page: Take screenshot > Save full page

I have almost 20 such screenshots where the Google AI answers are overlapping and certain areas of the screenshot are overlapping and cut off (in the attached screenshot, the Step-by-Step points number 2 and 3 for Fluffy Breakfast Pancakes is cut off). Really annoying. I would appreciate the concerned team taking a look and a fix for this.

To recreate: Ask Google AI anything (this is the Google AI that you get to from the google.com homepage by clicking the AI Mode button) and make sure the answer require some scrolling. Then right-click and Take Screenshot > Save full page. Overlapping/cut off screenshot is saved. Thanks

I have extensive bookmark collections organized under my bookmarks toolbar. I use different bookmark sets at home and work. I need them remain separate but would like them to be backed up and synced. For example, if I'm at home, I want to be able to toggle over to my WORK bookmarks with all the latest updates. Basically, I need distinct bookmark identities but don't care about keeping other work/home stuff isolated.

I tried making home and work profiles, but syncing them to my Mozilla account merged the bookmarks which was a mess that took a long time to straighten out.

Can 2 profiles be synced to the same Mozilla account without merging bookmarks toolbars? If I have to create a separate Mozilla account for each profile, that kind of defeats the purpose.

I've looked at the available docs but can't see a fix. Can someone advise how I can either:

A) Sync multiple profiles (with bookmarks) to my Mozilla account without merging the bookmarks toolbars B) Find another solution to let me toggle bookmark sets.

yahoo mail keeps requiring me to get code from gmail to view my mail. problem may be that my cookies are deleted when i close firefox. windows 11 desktop. Thanks for Your help

Hi Moz Support,

I've had this happen several times before, but this time it really annoyed me.

I sent tabs from one Firefox instance to another on another device. I closed these tabs on the source device. These tabs were quite old this time, I'd not opened them in a while - this becomes important later.

On the destination device, let's call it "madbilly's destination Firefox", these tabs didn't arrive. After doing a couple of tests where I sent a tab from my mobile to this instance, I realised that this was a similar problem to what I'd had before, which is one where a Firefox instance/profile for some reasons "resets" itself and it seems to create a new instance in Firefox Sync. Tabs which have previously been sent to "madbilly's destination Firefox" don't arrive, because (I think) it's not registered in Firefox Sync as the same instance. These sent tabs, if closed on the source instance (which I did) are lost, unless one reopens the source instance and Ctrl-Shift+T reopens closed tabs. Unfortunately, in this case because the tabs were old and I hadn't opened them for a while there was no way to do this, because Firefox doesn't remember closed tabs which are not stored in memory (another bug, any fix?), except for looking in old session store backups which I'm going to do after I write this post, though I don't know if that will work.

Also, on Android, because it only remembers 10 closed tabs it's not really feasible to retrieve lost sent tabs this way either, and as there's no access to the session store backups the tabs are definitely lost.

Oddly, when this happens "madbilly's destination Firefox" usually appears twice in the send-tab-to menu, but in this case it didn't. To be able to send to this instance I had to sign out of Firefox sync on this instance and sign in again. Then the same instance appeared twice in the sync menu, the old one being now unreachable.

I'd like to know: 1. Why does this happen? 2. How to avoid it happening? 3. Is there a bug registered about this? 4. When will it be fixed and prevented from happening again.

I generally find that this happens when a Firefox instance isn't shut down properly, which on my old desktop I put down to it running out of resources, but on this shiny new laptop from work that doesn't make sense.

All help much appreciated thanks :)

Watching any Bilibili live stream causes severe performance issues. The main problems I can observe are intermittent severe mouse cursor stuttering/frame drops or the cursor becoming unresponsive, accompanied by the taskbar process (explorer.exe) intermittently restarting.

I have tried disabling the Picture-in-Picture feature and tampermonkey add-on, modifying the Windows 11 registry to turn off MPO (Multiplane Overlay), adjusting browser hardware acceleration, and tweaking related settings in about:config, but none of these have been able to prevent the issue.