Firefox Community Forum

I understand that Firefox relies on both intermediate and root CA certificates for verifying add-on signatures. There was a recent incident where a root certificate expired on March 14, 2025, as noted in the following article: https://support.mozilla.org/en-US/kb/root-certificate-expiration

Could you please let me know the latest validity period (expiration date) of the root and intermediate certificates currently used for add-on signature verification in the latest version of Firefox (139.0.4)? I understand the certificates involved may vary depending on the add-on, but I would like to confirm this specifically for the following add-on:

X-Forwarded-For Header https://addons.mozilla.org/en-US/firefox/addon/x-forwarded-for-injector/

Thank you in advance for your assistance.

Hi, I already know that Firefox, especially LibreWolf, is probably the best browser along with TOR and Brave about protecting against fingerprinting. However, after reading this paper https://arxiv.org/abs/2506.00719 about browser fingerprinting via WebAssembly I am wondering if and how Firefox, LibreWolf, can protect us against it. I already read this https://support.mozilla.org/en-US/kb/firefox-protection-against-fingerprinting, but I could not find any reference to such protection. Thank you

Hello Support ,

iam using firefox 115.23 64Bit at my IMac an be not able to pass the security check when i try to login with my acount , i have checked all seetings an deleted all cooking an enabled : javascript at : about:config page an restarted firefox , but still i do not pass the security check : : chat.deepseek.com , to check if iam a human an mark the box an then continue it checking an then it asking again an again .. when i use another browsers there is. no problem an can login normal an comparing already the setting between those with chrome an brave an safari , but i can find the problem . when i chetGPT or Google gemini Ai sites there is no problem an i can acces normal ..

do you have any idear what settings i have to change at my firefox 115.23 because i want to use firefox as my default browser .. i can not update firefox to an higher realease because iam use High sierra 10.13.6 on my iMac .

regards M.Mols - *** [Edit: e-mailadres verwijderd i.v.m. privacy.]

We have recently been caught in an apparent marketing test simulation by an AI provider who we would never expect to prevent productivity resulting in great harm to those I support. So when emails were going nowhere and set MFA was systematically destroyed -- I turn to FireFox ESR personal to ensure my data remains secure among those world class suppliers I have trusted for years.

I trust FF but the subtle ways in which our WIndows10Pro is trying to wipe out all relationship with other OEMs - I want to be sure that FF is set up as it should be. It appears even in FF private browser window - that the OS or Copiliot is attempting to destroy that also as part of what is some scheme according to bank Fraud experts I've consulted as a scheme to destroy Win10 home office usage and force move to WIn11.

My home PC has supported many many individuals and organizations. I cannot believe what I have been put through,. Still rebuilding relationships with the worldclass firms I rely on.

What are the definitive steps that will ensure that data cannot be manipulated and OS cannot randomly overwrite desperately needed Disabilty / Accessiblity changes needed to even see the "simulations?' at 1-2point font. This activity is allegedly CoPilot - which would be the last place I would suspect. The violations of trust and data integrity go way beyond what you might imagine.

How to protect from any and all deceptive practices where what I"m seeing and doing are not being alterered in such ways that prevent me from supporting a Hipaa client because a rogue software misrepresnts and destroys valuable data and more importantly TRUST.

Part of undoing damage due to Coplilot is to follow those I trust - so regarding Firefox I download it from official Mozilla / Firefox - current ESR version for Personal use. - I try now to do most work that requires a modicum of importance - and still each moment there's some deceptive something or other trying to deceive me into excluding Firefox.

I'm not here to blame Copilot - and MS accountability for this is reported via the public domain and several professionals I've consulted. Feeling handicapped with handicapped devices. Totally hostage to a system that wants to ensure everything we do is via Microsoft.

There's a time and a place for security we can trust. I had security keys and MFA out the wazoo. It's taken amonth to even begin to get back to a secure wiped licensed Win10 system. And the first job was to ensure the OS could not mess with Firefox. Something is tearing at that already. My only involvement with MS at this point is to ensure they don't mess with FF's integrity. The FF account is an outlook address so pls LMK if that is hurting rather than helping.

I cant do anything if trust is violated and data is changed intentionally by a rogue software. Plus the overwritiung of accessiblity / disabilty modifications is unconscionable.

HOW TO KNOW I'M NOT MISSING THE LATEST TRICKS DESIGNED to take away FIrefox or others who we trust.

I’m experiencing an issue when trying to log in to my bank accounts using Firefox. Each time I sign in, my bank detects a different IP address and treats it as a new device. This results in a security hold, and I’m unable to make any transactions for 48 hours.

Could you please help me understand: - Why Firefox might be showing a different IP address to websites? - Is there a setting or feature in Firefox that could be causing this (like DNS over HTTPS or proxy-related features)? - How can I configure Firefox to maintain a consistent IP or browser identity for secure sites like my bank?

Thank you for your help.

Best regards,

I have a MV3 extension I created that has a popup and data that is stored in sessionstorage and extension storage.

When I use the extension in a private window it does not work because data does not persist between each time I open and close the popup.

This causes problems, for example you have I have to login each time I open the popup, instead of the auth status persisting. It works fine in a normal window though.

Is there anything I can do that allows data for an extension running in an inPrivate window to persist. (Maybe some additional manifest code / changing the browser config)

Dear Firefox Team,

I’ve been a loyal Firefox user for years, and I generally love your browser. However, I recently experienced a serious issue due to how Firefox handles saved sessions, cookies, and multiple logged-in accounts.

I had two Gmail accounts saved in Firefox, both of which were at some point used to access Fiverr accounts — one active, and one previously disabled. During a session where I was logged into my active Fiverr account, my internet went down temporarily. When I refreshed Fiverr after the connection came back, Firefox reloaded a session that appeared to be linked to the disabled Fiverr account — even though I never intentionally accessed it.

As a result, Fiverr’s automated system flagged my active account for being "connected" to a banned one. This has had a direct negative impact on my freelancing career — my account was permanently flagged, and I lost access to valuable clients and my work history.

I understand that session management and cookie handling are standard browser features, but I want to highlight how important session isolation and protection from unintended auto-logins are, especially for freelancers and remote workers using platforms like Fiverr, Upwork, and others.

Please consider offering better controls or clearer separation between accounts (e.g., warning before auto-loading saved sessions, stronger isolation per Gmail/Fiverr session, or more powerful multi-account browsing containers by default).

This small technical behavior has led to a major professional loss.

Thank you for your work on this browser, and I hope you’ll take this feedback seriously to help prevent this from affecting others in the future.

Sincerely, A frustrated (but still hopeful) Firefox user

– Ehsan, Freelancer

Hey everyone, I need some help with a puzzling issue. I've noticed that a website (https://storiescastle.com/coco-miguel-and-the-amazing-alebrijes-story/) I'm working on functions perfectly fine when I use Google Chrome, but when I try to access it using Mozilla Firefox, I encounter a '404 error' or sometimes the layout is broken with images displaying incorrectly. Can anyone shed some light on what might be causing this discrepancy? Your insights would be greatly appreciated!

Recently getting a warning of virus. https://aiwebfreeinstalls.autos/1igfp2gfa/l?btd=dHJrLmNvbG9ueS1zY29yZS1yZWxhdGVkLWRvbmtleS5ydW4&exptoken=MTczNTY5NjQ2MDA1MA%3D%3D&lang=en&lid=bf3dcebb-0892-4a88-9a74-4f2979083dc1&ltd=dHJrLmxlYWQtd2hpbGUtc3ltYm9sLWF0LnJ1bg&pd2q=YTE9YmYzZGNlYmItMDg5Mi00YTg4LTlhNzQtNGYyOTc5MDgzZGMxJmEyPTk0MGY4ZmU4LTJhMzEtNDE4Ny1iOTVjLTQ2ZjZjZmQzNzVmNiZhMz0&td=dHJrLmV2ZXItZXhwcmVzcy1hbHJlYWR5LWZpbmVzdC5ydW4vc253ZGFydGY&lvc=fc594690

I recently, was my own fault not protecting my visa card but got scammed, I chopped the card but yet somehow someone accessed my amazon account and tried purchasing something just the other day. I only use this laptop for amazon. My concern is how to stop people from getting access to this browser through shared wifi and the person got into this laptop through the smart tv in the part of shared accomodation. I matched the serial number of the device to the device that appeared in devices in my control panel which I never authorized to access my laptop. I dont allow any access to my "network" to anyone but somehow someone got access. Any advice would be greatly appreciated. And everytime I tether with my cell phone its alwys a new network that I get asked by microsoft if I want to allow discoverable which I dont, but I usually have 80 -100 networks due to every log in with teher and wifi booster. Thank you

Hello I have an application that shows forms where the input fields are inserted on table columns. When the column contains two fields sometimes the second field is showed not in the same line.

It must be said that the second field is added after the creation of the form.

Whit Chrome and Edge the form is showed correctly. At thislink the behavior can be seen. Thanks

As my title says, i manage to make my Tabs length to be as long as possible, i even manage to make it when i scroll with my mouse wheel one tab at a time, but after accepting to update Firefox, my tabs shrink when i play a video! or when i open a new youtube video in a new tab, that is only on youtube,

So how do i stop this? i do not need my tabs to shrink when i play a video