Showing questions for topic:
  • Browser security

Certificate Manager

What or who is Certification Manager? I have never heard of 99% of those listed in my settings. Why is this necessary? I would just like to go in there and delete every o… (read more)

What or who is Certification Manager? I have never heard of 99% of those listed in my settings. Why is this necessary? I would just like to go in there and delete every one of them!

RhonCa

Solved 1 18

Can I trust virus warnings I've just recd?

I don't know whether I can trust three warnings I've recd, ostensibly from Mozilla Firefox: -Attention Click here to secure your data. -McAfee: 3 viruses found, Hard dr… (read more)

I don't know whether I can trust three warnings I've recd, ostensibly from Mozilla Firefox: -Attention Click here to secure your data. -McAfee: 3 viruses found, Hard drive is infected! Remove viruses via ...(but I don't have a McAfee account) -McAfee license has expired. Click here to stay protected online? via ....

I have run MalwareBytes (basic free account) and it found nothing.

Solved 1 36

How to Turn off " This connection is not secure...popup"

There must be a way to turn off this popup off. This is REALLY annoying when it covers a password box and to remove it i must click outside it and I lose focus on the p… (read more)

There must be a way to turn off this popup off. This is REALLY annoying when it covers a password box and to remove it i must click outside it and I lose focus on the password box. If you must put he box there then at least leave the first part of the password box clear so I cab click on it and not have to click again to get the focus back.

Solved 6 136

Question - new Firefox built in VPN

Regarding the new built in Firefox VPN. If I have Tabs open and Enable the VPN on a New Tab, does it then affect all previously opened Tabs, only the New Tab, only the Ne… (read more)

Regarding the new built in Firefox VPN. If I have Tabs open and Enable the VPN on a New Tab, does it then affect all previously opened Tabs, only the New Tab, only the New Tab and Tabs opened after that initial New Tab, or ? Also, is there a Meter Display or similar so I know how much of the 50GB VPN allotment has been used or is remaining ? Thank you, very kindly ...-- J V

Solved 4 72

Project Glasswing

Hi, Microsoft and Google are part of Anthropic's Project Glasswing but Mozilla is not. I am concerned about Firefox security if Mozilla in not being included. What is yo… (read more)

Hi,

Microsoft and Google are part of Anthropic's Project Glasswing but Mozilla is not. I am concerned about Firefox security if Mozilla in not being included. What is your plan to participate? Do I need to switch browsers in the meantime? Please advise. Thanks.

Cheers

Solved 2 36

private window

Hi, Why private window is the same as general window browse? It should be different, yesterday was different, when I created a new account, this new private window change… (read more)

Hi,

Why private window is the same as general window browse? It should be different, yesterday was different, when I created a new account, this new private window change it to the public window, are they any bugs? Can you fix it? Thanks.

Locked 1 36

SameSite flag no longer default?

Hi, I noticed that in the latest release (I tried both MacOS and Windows 11 ARM versions) that the "network.cookie.sameSite.laxByDefault" is no longer enabled, and cookie… (read more)

Hi,

I noticed that in the latest release (I tried both MacOS and Windows 11 ARM versions) that the "network.cookie.sameSite.laxByDefault" is no longer enabled, and cookies set by applications without specifying the flag, are not set with Lax and are sent in cross-origin requests. Could you clarify if this is intentional and why the change has been made?

Thanks

Solved 7 72

The lock icon gone away from https site

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 conte… (read more)

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.

Solved 2 72

When an extension wants to "Access your data for all websites", what does this encompass?

Some extensions I use have been updated and now ask permission to "Access your data for all websites." What is the scope of this access? Can an extension which facilita… (read more)

Some extensions I use have been updated and now ask permission to "Access your data for all websites." What is the scope of this access? Can an extension which facilitates video downloads see my bank password? Can it access data for sites in a different Firefox container? Can it access sites which I use in a different browser? Can it access data for sites which, on my system, are only available to a different user? Thanks for any clarification. [I am running Firefox 149.0 under Kubuntu 24.04]

Solved 4 117

"Security Sandbox is disabled" pop up under toolbar

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… (read more)

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.

Solved Archived 21 497

Firefox installed Web Apps without my consent

Hi, I am using Firefox exclusively for my work Claude account, I only check my usage on it. Today, I noticed Firefox silently installed a webapp under $USER/AppData/Roami… (read more)

Hi, I am using Firefox exclusively for my work Claude account, I only check my usage on it. Today, I noticed Firefox silently installed a webapp under $USER/AppData/Roaming/Microsoft/Windows/Start Menu/Programs, and it has a Claude webapp, which I neither click any install or add to my menu. I found it extremely concerning in terms of privacy, and I am wondering if any other people have similar experience.

Solved 4 108

How to make a screenshot in private browsing?

When I make a screenshot in private browsing the picture is black. With my former android there was no problem. Now I have a fairphone 6 and I can no longer make the scre… (read more)

When I make a screenshot in private browsing the picture is black. With my former android there was no problem. Now I have a fairphone 6 and I can no longer make the screenshots in private browsing. Is there a solution fot this problem or do I need to switch to normal browsing whenever I want to make a screenshot?

Solved 1 207

What access does AI chatbot have to browsing when not active?

When the AI chatbot is enabled in the sidebar but "collapsed" -- the tool not engaged -- is any data sent to the chatbot provider? Can the chatbot be collecting data whil… (read more)

When the AI chatbot is enabled in the sidebar but "collapsed" -- the tool not engaged -- is any data sent to the chatbot provider? Can the chatbot be collecting data while not engaging with the user? Or is context sent only with prompts and limited to the tab that is open?

What sort of sandboxing is enforced by Firefox?

Solved 1 99

Trojan horse pop ups

I am getting repeated pop up "alerts" from Firefox, McAfee and others about Trojan Horse and other viruses. I did not click on the links offered. How do I stop them fro… (read more)

I am getting repeated pop up "alerts" from Firefox, McAfee and others about Trojan Horse and other viruses. I did not click on the links offered. How do I stop them from coming?

Solved 1 198

Malware "startfenster"

I can't delete the malware "Startfenster. I tried to find help with "Google"-Search. Without any success! This malware exists for me in "Firefox" only. Other browsers ar… (read more)

I can't delete the malware "Startfenster. I tried to find help with "Google"-Search. Without any success! This malware exists for me in "Firefox" only. Other browsers are not affected. Perhaps anyone can help me... Thank's!

Solved 4 99

Site-isolation on Android

Hi, Super cool site-isolation is now rolled out for Firefox Android! I was checking the 'about:memory' and 'about:process' info pages and noted that there only seems two … (read more)

Hi,

Super cool site-isolation is now rolled out for Firefox Android!

I was checking the 'about:memory' and 'about:process' info pages and noted that there only seems two different processes for all tabs. As Firefox desktop achieves site-isolation via different processes per tab I was wondering if on my android device its correctly enabled. Can you elaborate if this is intended and how the site-isolation on android works?

Thanks!

Solved 1 126