Diễn đàn hỗ trợ Firefox

I attempted to put in an address of what I thought was a website today on mozilla. I soon found out that it was not available or a proper website.

Now I am getting alarming notices with heading Mozilla Firefox all via what looks like an Indian website, saying 1. Click to secure your 2. Trojan detected Fix it now. 3. Critical Error. Click here to remove them.

I have not clicked on any part apart from the x top right to remove the notifications. I can send photos of them

I have scanned with my Windows Security repeatedly and nothing.

Max

PS. The messages are obstinate to remove and it takes effort to x them.

Some users are abandoning Firefox because of the difficulty of protecting against Firefox fingerprinting. Therefore, I strongly recommend adding an option in the settings that allows the digital fingerprints to be made random, or at least, if it is difficult, to make the fingerprints indistinguishable. This will help improve Firefox’s reputation and the privacy of its users. Love you all 3:

Kaspersky just found this hidden in the Firefox cache folder and the funny part is that I don't even use Firefox that much. I didn't visit any sites on this particular Firefox except Facebook. So, what sort of malware is this? A Trojan stealer or a dropper of some sort? I am running a Full Scan for now and I have uninstalled all the browsers incl Firefox, Chrome. Detection name: Trojan.JS.Agent.exz

The details of Detection: Event: Object deleted User: DEMON-SLAYER-2\....... User type: Initiator Application name: avpui.exe Application path: C:\Program Files (x86)\Kaspersky Lab\Kaspersky 21.22 Component: File Anti-Virus Result description: Deleted Type: Trojan Name: Trojan.JS.Agent.exz Precision: Exactly Threat level: High Object type: File Object name: 2309DFD956392BDFD0C84CA455FF6426B6B0FA9F Object path: C:\Users\......\AppData\Local\Mozilla\Firefox\Profiles\i2607jtb.default-release-1739822052193\cache2\entries MD5 of an object: 6FEC3D1DC6D1802AEADC4F8611A9F326

Since this is a Trojan, can this be Dangerous? I scanned it in virustotal and 33 engines were saying malware.

Virustotal link: https://www(dot)virustotal(dot)com/gui/file/2cee43e2e59ade158bfe5b124c07e9e45b7a378e379a8be8bb3272b10cf344e2/detection

I keep getting notices that I have a virus that can't be found by my AV programs and gives a website of yfyfx.freshadsflow.top.

I keep closing the notice out or selecting the "Dismiss" button but it keeps coming back. If I unistall Firefox and reinstall it will I lose all of my bookmarks?

Seriously Mozilla.

First with ramming AI everywhere in Firefox, now a browser VPN, why?

I do not want a VPN the web browser that I didn't ask for or other features you think people need without asking.

Corporate and business users would not have a bar of this either.

Enough!

Remove this from Firefox please in the next release.

In the meantime, tell users how to disable this VPN via the Settings and "about:config" so this never gets turned on.

Hello! Long time Firefox user here, grew up with a father working in IT security. He's mentioned this a few times before, but now we've both really noticed the push towards using generative AI in roles in IT where it's really unsuitable, and honestly quite a risk to security and privacy, not to mention quite a waste of time having to fact check things properly because I cannot even be sure that the first result in a Google search for "how far away is the moon" will be correct. We're quite concerned that Firefox is following suit, especially with the new CEO evidently not understanding some of the fundamentals of why this browser has such a dedicated user base. Just wondering if saving the money by not having to hire competent, trained professionals who can provide the human touch needed to run a browser is truly worth eroding Firefox's reputation of being the genuinely good alternative to Chrome? How long before the AI stops being optional? How much of the code is going to end up written by some language learning algorithm and passed off as safe? If this push is to continue, what alternatives does anyone in the community suggest? Thank you for any responses from both myself and my father :-)

I assume Mozilla developers are working on this?

https://singularityhub.com/2026/04/10/anthropics-mythos-ai-uncovered-serious-security-holes-in-every-major-os-and-browser/

Quote from the article

"Its capabilities are a step change from the previous best models. Given the challenge of attacking the Firefox web browser’s JavaScript engine, Anthropic’s previous most powerful model Opus 4.6 succeeded just twice, compared to 181 times for Mythos. Most worryingly, the team found that engineers with no security background could use it to develop successful attacks overnight."

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 have picked up some bug(s) on my Firefox that I cannot figure out how to get rid of. With a Firefox ID I have warnings of 3 Trojan Virus detected, Virus detected, hard drive infected, secure data notice and system alert. I also got a warning that my McAfee protection had expired which is very strange. Since switching over in 2010 from Windows to Linux I have never had protection of any kind and unlike Windows have never had a single problem. In addition when I was using Windows the protection that I had was never McAfee. I suspect that these warnings are not from Firefox given the misprints, spelling errors and the poor English. It is likely phishing from some third world country. How do I get rid of this obvious garbage permanently? Many thanks! Kris

Maybe settings?

I started getting a different login screen for yahoo and so I was on the lookout for the https:// that would ensure I'm at a real website. I noticed that I don't get any https:// on anything in my FF esr 140. Even if I enter it with the address, it disappears as soon as I click to open the website. I tried out Edge and the https:// is there. Is there some reason this is being removed in FF, as it is something reassuring and doesn't take up much space.

Thank you!

Hello This evening as I was going to pay for a book on a site well known to me, I notice that I don’t see a lock to the left of the address. I read your page 'Mixed content blocking in Firefox' after seeing that its little French sister was not up to date and it seems that it is the version of Firefox installed tonight that is behind this big change. Even my bank’s site no longer shows padlocks and it’s destabilizing. Why such a change without explanation??? I only read information about the split view in the same tab (which seems very useful) but nothing about this disappearance of the lock... Can you confirm that it is indeed the version from tonight 27/03/2026 that made this change at first glance worrying.

Thank you in advance and have a good day.

I am currently getting unwanted popups purporting to be from firefox about virus protection. I know they are fake because they report my McAfee license has expired, and it hasn't. I have McAfee scanning for viruses right now. They are generated over again when I close them; so I can't get rid of them.

I'm about to remove Firefox from my laptop due to unwanted popups from an explicit and aggressive site called chaturbate. I installed Firefox because I was told it's a more secure browser. I'm seriously questioning my decision now. Does anyone have any suggestions to stop this from happening and to avoid any new events from occurring?

there's no way I'll continue to use Firefox if AI is implemented, for years the reason I used this browser is because of it's safety and security and I believe if AI is implemented that will indefinitely go away. I will ditch this browser if this comes to pass.

We’re experiencing intermittent OCSP issues where all our internal sites fail to validate certificates. The problem appears random and sometimes resolves by simply closing and reopening Firefox.

One of your forums mentions disabling OCSP checking via the UI, but that option is no longer available in the latest version (147.0.1).

We’ve temporarily disabled it via about:config by setting security.OCSP.enabled to false.

Is there a permanent way to disable OCSP checking that can be enforced via Group Policy (GPO)?

using (file, edit, view) type page and would like to change the bookmarks dropdown menu i would like to get rid of: Bookmark current tab, seach bookmarks, bookmark all tabs and the separators i don't use tabs, i just open new windows if i can't delete them, would like to be able to move them to the bottom thank you

Hi i saw something saying the browser wanted to use more ai etc, is this true? Is there a way to opt out of these services in total if so?

I use firefox for the privacy and to avoid bloatware so itld be really disappointing if its now looking to use ai more in its services.