Firefox Community Forum

I recently opened Firefox to see a new flagged warning under my toolbar that says "The security sandbox is disabled. Your configuration is unsupported and less secure."

I have gone into about:config and adjusted every security.sandbox element to see if that would change anything; it did not.

I am running on Windows 11 Home so I cannot install or properly run Windows Sandbox.

I would either like a solution to enable the sandbox once again, or just remove the notification from the toolbar.

A pop-up screen often appears when I use Firefox. It says hat I have a virus and that I need to call a phone number to remove it. It claims to be Norton,but I doubt that it ts. I have attempted to remove this with Microsoft Defender, SuperAntiSpyware and Trend Housecall but none of them work. Can you help me?

New to Mozilla! Just "your opinion." on average, and I know this can be a relevant question, how should I approach banking transactions on this Browser? is it among the saver ones.

Hello... I'm just a novice user so I am not really sure here. This is my problem, I tried to view my gmail account and I got the pic in post. I'm not sure what to think, I like to know if it's secure to use Firefox? I'm using Windows 11 all up to date and Firefox 147.01 ... extensions >> uBlock, Chrome Mask, Ghostery Tracker & Ad Blocker, Privacy Badger

I need help with Google telling me that I have been breached and I am not safe need to clean my phone or it will expire also that they would block me from play store what is going on??? They try to keep me from Firefox like getting rid of the extinction that you all suggested to download which I done to keep my account's safe and they keep pushing gaurdio on me I don't have the money to pay every month...

      PLEASE HELP ME!!!!!

When accessing important accounts on websites, like financial websites, I've always heard you should close your browser when you're done with the secure website. If you log on in a PRIVATE window and close the private window afterword but leave the main FireFox window open, is that the same thing? I think it is and the private window will delete any login or activity info as if you closed the browser, I just want to confirm with someone more knowledgeable before I make a bad assumption. It also seems to have the added benefit of deleting anything you might download and save elsewhere from the download folder so you don't have to delete it from the DL folder and then the recycle bin. Seems like it's good practice to use the private window this way. Again, just looking for a 2nd opinion.

Thanks,

Ich habe über die Sicherheitssoftware "Trend Micro Security" eingestellt, dass keine heiklen Daten wie Kreditkartennummer, Debitnummer, Kontonummer etc den PC verlassen, ohne dass ich zustimme. Nun bekomme ich, wenn ich Mozilla Firefox öffne, ständig die Warnung von Trend Micro, dass die Sicherheitssoftware verhindert hat, das Mozilla eine von den gepeicherten Nummern übertragen wollte. "Die Funktion zum Schutz vor Datendiebstählen hat verhindert, dass geschütze Daten den Computer verlassen." Angegeben ist das Programm "Firefox.exe". Was passiert da bei Firefox im Hintergrund?

H&HNY2U&2U I'll appreciate your help! Please clarify if the alert containing a Firefox logo (pictured in the upper right corner of the image I attached), which flashed repeatedly while viewing the Apple page, is actually from Firefox or is a fake. thanks, HJK

I am just burned out with Firefox and not sure why I should continue to use it instead of some fork or Chromium-based browser.

It seems like every update brings some new GenAI/LLM component that is auto-enabled and difficult to disable. I do not want GenAI/LLMs in my web browser. I have dropped nearly every other application or software that has forced it on me and included it in their product. I feel like I'm trying manage a Windows system having to follow blogs to debloat, restore privacy, and restore security. GenAI/LLMs shouldn't be in my web browser. And, they should be opt-in, not opt-out in some confusing mix of GUI and about:config madness. If GenAI/LLM is so great, then make it an extension or a fork then let those folks use it from there. Don't bake it into the web browser.

I continue to use Firefox for uBlock Origin but I guess that would be possible with a Firefox-fork. However, I am just tired of having to continuously manage my Firefox browser and battle websites that only support Chromium-based browsers. If Firefox actually seemed intent on improving security and privacy then I could find the motivation but this GenAI/LLM nonsense seems the point of no return.

On my Android phone, I've switched to a Chromium-based browser given the poor state of security and hardening for the vanilla Firefox. I keep IronFox on hand but it is just easier to surf the web with a Chromium-based browser due to many websites just working better. Why should I deal with the pain and frustration of limited Firefox support when Firefox isn't even keeping up with security hardening?

As for desktop, the Firefox browser just doesn't seem as snappy or stable as I would expect. Firefox for Linux is still not supported for Slack Huddles. How is it 2026 and Mozilla/Firefox are still not fully functional with one of the major business chat platforms? Yes, I know this primarily a Slack and AWS-Chime-SDK problem but it is also a Firefox problem because there isn't much that a user can do. I've tried to prod Slack and the AWS teams numerous times to support Firefox but they've just done nothing. I also see nothing being done by the Firefox team, too.

Another example is the EdgeSuite CDN. Nearly always they block my traffic when I use Firefox. Switch to a Chromium-based browser and EdgeSuite is much less likely to block me. This is fairly consistent for the retail and financial institutions I use.

As far as I am aware, many of the security concerns brought up by Madaidan in 2022 still hold true for Firefox today, especially for Android and Linux. If this is no longer true, then it might be good for the Firefox team to post a rebuttal or update clarifying the current state of Firefox. The average users such as myself only see the Madaidan blog post and have to take it at face value. https://madaidans-insecurities.github.io/firefox-chromium.html

Anyway, I don't see a way ahead for me and Firefox but maybe you can convince me. It just seems like Firefox and Mozilla have lost their way. They no longer seem focused on security and privacy. Instead they're forcing privacy, security, and system resource disasters onto their userbases, just like Microsoft, Google, and every one of the major tech firms. I just don't see why I should use, promote, and even support Firefox going into 2026.

Was prompted to download a program to Firefox before I paid my phone bill. I did not recognize the web address or name that was shown, and the account number from which recent payment was deducted did match any accounts I hold or held in the past. I cancelled the action immediately, without downloading, but am still concerned. I found nothing on the internet about this, just got a summation chat AI response that stated the phone company had no download/extension for Firefox. Has anyone had any experience like this or could someone shed some light on this?

see what appears when I open firefox as an uploaded image: has anyone else had this appear... can not find a way to report what in my view is fraud...'AI' said no new terms,conditions,privacy by firefox, mozilla since spring so is it a 'page overlay' as 'AI' said? also I can not find a way that will open to report to mozilla, can some one forward to report fraud?

If there only one question I get an answer to that would be: how can I delete it and block it forever?

thx

I'm getting announcements of a virus threat that purports to come from Mozilla Firefox. Usually one or all three of the attached small windows that say: 1. "Viruses Found. Antivirus notification. via https+++d512ucanaffc739fe48g.cgm-defender.pro" With a Dismiss button. 2. Attention! Click here to secure your data!. via https+++d512ucanaffc739fe48g.cgm-defender.pro" With a Dismiss button. 3. "System Warning!. Click here to remove them! via https+++d512ucanaffc739fe48g.cgm-defender.pro" With a Dismiss button. I have run full scans and offline scans with MS Defender, but these warnings still appear. Is this legit? I suspect these are a virus of some sort. Either way, how do I deal with this?

I have a warning underneath my bookmark ribbon that says, "The security sandbox is disabled. Your configuration is unsupported and less secure." What is the security sandbox and what configuration is needed so that it supports the security sandbox. What happens if this security sandbox is disabled while I'm running Firefox?

I'm running Firefox v146.0.1