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Mozilla logoOpens in new window Mozilla Accounts Terms of Service

Last Updated November 1, 2023 {: datetime="2023-11-01" } Summary

This top section summarizes the terms below. This summary is provided to help your understanding of the terms, but be sure to read the entire document, because when you agree to it, you are indicating you accept all of the terms, not just this summary.

   Mozilla accounts (the "Services") include your account and the suite of services provided to you by Mozilla using that account.
   The Services are provided "as is" and there are no warranties of any kind. There are significant limits on Mozilla's liability for any damages arising from your use of the Services.

Terms of Service

   Introduction

   These Terms of Service ("Terms") govern your use of Mozilla accounts, a suite of online services provided by Mozilla (the "Services").
   Mozilla Accounts

   In order to use some of the Services, you'll need to create a Mozilla account. During registration, you will be asked to set a password. You are responsible for keeping your password confidential and for the activity that happens through your Mozilla account. Mozilla is not responsible for any losses arising out of unauthorized use of your Mozilla account.
   Services

   (a) Mozilla VPN is a Virtual Private Network in partnership with MullvadOpens in new window. A Mozilla account is required.

   (b) Firefox Relay allows you to keep your primary email address safe and private from online services by making unique, alias email addresses that allow you to send and receive emails without revealing your primary email address. A Mozilla account is required.

   (c) Firefox Monitor is an informational service to promote online security by informing you of public data breaches. You can scan email addresses on our website to see most publicly known breaches. If you subscribe with a Mozilla account, you will receive:
       Full Report: This includes a complete list of publicly known hacks, including breaches of sensitive websites, such as those for children or adult and dating sites (these sites are excluded from website scans in order to protect the privacy of those individuals).
       Breach Alerts: This notifies you if your email address appears in a new data breach.
       Safety Tips: This sends you occasional online safety tips from Mozilla.

   It is your responsibility to protect your online accounts using strong and different passwords, security questions, two-factor authentication, password managers, and other safety measures. Although Firefox Monitor and Have I Been Pwned?Opens in new window strive to have current data, there is no guarantee that either will have complete or timely records of all public data breaches.

   (d) Firefox Notes lets you take notes in Firefox. A Mozilla account is required to view, edit, and delete your Notes across devices.

   (e) Firefox sync lets you access information stored in Firefox across devices, including your tabs, awesome bar, passwords, bookmarks, and browser preferences. You can enable and disable Firefox sync through the Settings section of Firefox. A Mozilla account is required.

   (f) Pocket helps you discover great content that’s personalized to your interests and save this content so you can return to it later – on any device, at any time.
   Privacy Policy

   We use the information we receive through the Services as described in our Mozilla Privacy PolicyOpens in new window. Our Privacy Notices describe in more detail the data we receive from each service:
       Firefox MonitorOpens in new window
       Firefox NotesOpens in new window
       Firefox syncOpens in new window
       Firefox RelayOpens in new window
       Mozilla VPNOpens in new window
       PocketOpens in new window
       MDN PlusOpens in new window
   Communications

   We send periodic messages to help you get the most from your Mozilla account. You may receive these in-product or to the address you signed-up with; they cover onboarding, different Mozilla account services, and related offers and surveys. You may also choose to receive other types of email messages.

   You can change your email subscriptions with Mozilla from our emails (click the link at the bottom) or from the browser (visit Firefox / Preferences / Sync / Manage account / Email Preferences).

   We may also send you important account information such as updates to legal or privacy terms, or security messages like password resets, email verification, and linked devices. These are necessary to our services and cannot be unsubscribed from. You can contact Mozilla at Mozilla Corporation Attn: Mozilla – Legal Notices 149 New Montgomery St, 4th Floor, San Francisco, CA 94105 or legal-notices@mozilla.com
   Your Content in Our Services

   You may upload content to Mozilla as part of the features of the Services. By uploading content, you hereby grant us a nonexclusive, royalty-free, worldwide license to use your content to provide the Services. You hereby represent and warrant that your content will not infringe the rights of any third party and will comply with any content guidelines presented by Mozilla. See here to report claims of copyright or trademark infringementOpens in new window.
   Mozilla's Proprietary Rights

   Mozilla does not grant you any intellectual property rights in the Services that are not specifically stated in these Terms. For example, these Terms do not provide the right to use any of Mozilla's copyrights, trade names, trademarks, service marks, logos, domain names, or other distinctive brand features.
   Term; Termination

   These Terms will continue to apply until ended by either you or Mozilla. You can choose to end them at any time for any reason by deleting your Mozilla account, discontinuing your use of the Services, and if applicable, unsubscribing from our emails.

   We may suspend or terminate your access to the Services at any time for any reason, including, but not limited to, if we reasonably believe: (i) you have violated these Terms, (ii) you create risk or possible legal exposure for us; or (iii) our provision of the Services to you is no longer commercially viable. We will make reasonable efforts to notify you by the email address associated with your Mozilla account or the next time you attempt to access the Services.

   In all such cases, these Terms shall terminate, including, without limitation, your license to use the Services, except that the following sections shall continue to apply: Indemnification, Disclaimer; Limitation of Liability, Miscellaneous.
   Indemnification

   You agree to defend, indemnify and hold harmless Mozilla, its contractors, contributors, licensors, and partners, and their respective directors, officers, employees and agents ("Indemnified Parties") from and against any and all third party claims and expenses, including attorneys' fees, arising out of or related to your use of the Services (including, but not limited to, from any content uploaded by you).
   Disclaimer; Limitation of Liability

   THE SERVICES ARE PROVIDED "AS IS" WITH ALL FAULTS. TO THE EXTENT PERMITTED BY LAW, MOZILLA AND THE INDEMNIFIED PARTIES HEREBY DISCLAIM ALL WARRANTIES, WHETHER EXPRESS OR IMPLIED, INCLUDING WITHOUT LIMITATION WARRANTIES THAT THE SERVICES ARE FREE OF DEFECTS, MERCHANTABLE, FIT FOR A PARTICULAR PURPOSE, AND NON-INFRINGING. YOU BEAR THE ENTIRE RISK AS TO SELECTING THE SERVICES FOR YOUR PURPOSES AND AS TO THE QUALITY AND PERFORMANCE OF THE SERVICES, INCLUDING WITHOUT LIMITATION THE RISK THAT YOUR CONTENT IS DELETED OR CORRUPTED OR THAT SOMEONE ELSE ACCESSES YOUR ONLINE ACCOUNTS. THIS LIMITATION WILL APPLY NOTWITHSTANDING THE FAILURE OF ESSENTIAL PURPOSE OF ANY REMEDY. SOME JURISDICTIONS DO NOT ALLOW THE EXCLUSION OR LIMITATION OF IMPLIED WARRANTIES, SO THIS DISCLAIMER MAY NOT APPLY TO YOU.

   EXCEPT AS REQUIRED BY LAW, MOZILLA AND THE INDEMNIFIED PARTIES WILL NOT BE LIABLE FOR ANY INDIRECT, SPECIAL, INCIDENTAL, CONSEQUENTIAL, OR EXEMPLARY DAMAGES ARISING OUT OF OR IN ANY WAY RELATING TO THESE TERMS OR THE USE OF OR INABILITY TO USE THE SERVICES, INCLUDING WITHOUT LIMITATION DIRECT AND INDIRECT DAMAGES FOR LOSS OF GOODWILL, WORK STOPPAGE, LOST PROFITS, LOSS OF DATA, AND COMPUTER FAILURE OR MALFUNCTION, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGES AND REGARDLESS OF THE THEORY (CONTRACT, TORT, OR OTHERWISE) UPON WHICH SUCH CLAIM IS BASED. THE COLLECTIVE LIABILITY OF MOZILLA AND THE INDEMNIFIED PARTIES UNDER THIS AGREEMENT WILL NOT EXCEED $500 (FIVE HUNDRED DOLLARS). SOME JURISDICTIONS DO NOT ALLOW THE EXCLUSION OR LIMITATION OF INCIDENTAL, CONSEQUENTIAL, OR SPECIAL DAMAGES, SO THIS EXCLUSION AND LIMITATION MAY NOT APPLY TO YOU.
   Modifications to these Terms

   Mozilla may update these Terms from time to time to address a new Service, feature of the Services, or to clarify a provision. The updated Terms will be posted online. If the changes are substantive, we will announce the update through Mozilla's usual channels for such announcements such as blog posts and forums. Your continued use of the Services after the effective date of such changes constitutes your acceptance of such changes. To make your review more convenient, we will post an effective date at the top of this page.
   Miscellaneous

   These Terms are governed by the laws of the state of California, U.S.A., excluding its conflict of law provisions. If any portion of these Terms is held to be invalid or unenforceable, the remaining portions will remain in full force and effect. In the event of a conflict between a translated version of these terms and the English language version, the English language version shall control.

Hi

I've just booted my machine and opened Firefox, only to be presented with a completely fresh install.

All my settings, bookmarks and history gone. It was fine yesterday when I closed it and powered down.

I'm running Kubuntu, I've checked the .mozilla folder and nothing...it's like my profile has just been overwritten.

Not happy at all, I'm starting to dislike Firefox.

Can anyone offer any help or advice please?

Thanks in advance.

Today for the first time after the latest update 127.0 (64-bit), my many firefox pages and tabs crashed and closed and a pop up to send crash report.

So I have fired up firefox again to find only a single page opens up, I have lost probably 16+ pages with multiple tabs on each, been like that for months, I have 32GB memory so there is normally no issues or slowness. However after the crash, even though only a single firefox page is open, windows task manager shows Firefox (20) and if I expand the task, I can see each firefox is taking lots of memory.

So it looks like the old session pages/tabs are still there somewhere but not accessible, I would like to get them back if possible. I went through reseting it to default, disabling the add ons etc but nothing has worked.

Over the past few days (Oct. 18, 2024) the green Download button has been missing. When can we look forward to the fix? Have uninstalled & reinstalled twice. Thanks.

Automatically hide taskbar in desktop mode => Enabled Firefox => Maximised When cursor is moved to outer edge of screen, taskbar should unhide (Expected behaviour) but in this case it remain hidden (Reality). Firefox along with all other spinoffs give same result. Chromium based browser works perfect, and taskbar automatically unhide itself.

As OLED screen have became common as monitor, Taskbar auto-hide is must. If this issue cann't be fixed I may have to change my primary browser which I used for almost 15 years.

Kindly, look into it. If Chromium can do it, why not Firefox.

Since updating Firefox I can no longer connect to known good sites without getting "Did Not Connect: Potential Security Issue".

This includes U.S. government sites! For instance, try connecting to https://covidtests.gov/ .

Why completely block access to the site? Why can't I make exceptions or tell Firefox to accept the risk and continue?

My system memory is reading at 57% right now in task manager, that the vast majority of that is being used by Firefox.

Why?

Normally, this would be called a flaw in the program, not the user, as all I have done in regards to settings is "keep tabs previous open when re-opening Firefox" and "Do not automatically update" because Firefox took it upon itself to not re-open my previous tabs on the last update.

Why is this program eating up all of that memory? I have "Firefox (15)" in Task manager under "Apps" and then 13 more instances of Firefox in "Backround Processes"

Wtf?

I currently can't stream anything, and this keep getting this message: Widevine Content Decryption Module provided by Google Inc. will be installed shortly,but it never installs.

I have a macbook air and am currently running macOS Sequoia version 15.0.1.

I tried uninstalling and reinstalling, removing extensions, clearing cache and data, unchecking and then checking back again the reproduce drm protected content but nothing has worked.

I tried to log on this morning to my mail and get this link" https://guce.yahoo.com/consent?brandType" with a pop up page "oops something went wrong"

all searches I have done to try and resolve seem to be 2019 or older with the 2024 being locked.

I type in yahoo.com, do a search yahoo, they all come up the same message. anything yahoo related I cannot load. and get this same message.

I run malware byte and Ccleaner neither solved this issue

I use Microsoft edge and have no issues.

thank you

Hi, I am on Firefox version 150, but I can't see the new free VPN button. I wanted to try it out, but I can't see it anywhere in my settings. Any advice would be appreciated.

I was following https://support.mozilla.org/en-US/kb/built-in-vpn?utm_source=www.firefox.com&utm_medium=referral&utm_campaign=whatsnew-150#w_turn-on-vpn-in-firefox , but there isn't a button like it shows

In Firefox, and only in Firefox, I get 'Failed to verify your identity' on these sites. I have updated MacOS and Firefox, rebooted, tried a different DNS, and disabled all of my extensions. With extensions disabled I don't get the error, but the login site won't accept my login at all. See the attached image. I can't think of anything else to try.

how to permit

http://127.0.0.1:10080/wordpress/wp-login 

?

This address uses a network port which is normally used for purposes other than Web browsing. Firefox has canceled the request for your protection.

To be honest. Firefox is starting to be a big pain to use. I'm starting to see more and more of this screen where it say's "Be careful. Something doesn't look right" Even when i go to the advance and say proceed. Nothing happens and i'm getting no where. I know many of the sites don't have anything to do with asking for credit card, Scam or even having popup's. I test the sites in other browsers and there work without any issues. But Firefox is starting to lock me out of many sites due to this. How can i make this stop. As i used Firefox for many years.

The sample that is in the screenshot is a Anime data base that i have also used for years. But today shows this. But was working fine yesteday. What is going on and how can i fix it. So i can start using the browser that i love on the sites i want to.

I am a bit confused about how to keep updating FF on my Windows 7 PC, given that after March my current version (115.17.0esr) may not work as intended. Until now I've always updated manually by downloading a small 343KB installer file that updated FF without changing any of my settings, logins and bookmarks. Hoping to simplify updating, today I set updates to "Automatically install updates (recommended)" with sub-option "When Firefox is not running". But just now a FF notification informed me it was unable to update automatically and provided a link to https://www.mozilla.org/en-GB/firefox/enterprise/?reason=manual-update. From the dropdown there I chose "Windows 64-bit" > "Firefox Extended Support Release (ESR)". The download is a 64MB file.

Since this seems to be a new installation and not a simple update, can I be sure it won't overwrite my current version and leave me without settings, logins and bookmarks?

When I'm in full screen mode, The Apple, "Firefox" "File" "Edit" "View" "History" "Bookmarks" "Tools" etc menu bar shows up at the top and won't disappear. On my iMac Pro, it doesn't show up. i.e. Off.

I can't figure out what is the setting to make sure it does not appear. I went digging everywhere and can't figure it out. If you could tell me what config, etc I'm missing I'd appreciate it.

Screen shot attached to show which menu bar I mean.

My firefox is up to date: 126.0 (64-bit)

I am on Linux Mint 21.2, and I just updated Firefox (141.0). Now, the bookmarks bar, toolbar, and the tabs (everything above the displayed page), as well as the menu, bookmarks menu, and sidebar, are in light mode even though I have dark mode set (They were dark before the update). I tried playing with the Dark Mode settings to no avail. My system is set to dark mode in general. Are others experiencing this? Is there some sort of fix?

Good day, The issues that I am encountering are explained below. The solution found after hours of research is uBlock Origin : https://ublockorigin.com/. Do you know which filters and rules should be applied to exclude the Wikimedia Foundation and all of its derivatives from the results provided by my search engine? Please share your knowledge. Sincerely. ________________________________________________________________________________________________________________________ I am utilizing Firefox ESR 128.10 desktop version on the Linux operating system. I wish to conduct research on the internet, utilizing the Startpage search engine. I would like to exclude the following sites from my search results: wikipedia.org, the Wikimedia Foundation, and any affiliated websites, regardless of the language or location settings configured.

What is the correct approach to establish a customized Startpage search profile excluding all Wikimedia Foundation sites? What is the proper setting to create a persistent and customized search engine configuration that excludes all Wikimedia Foundation domains even after an operating system update or reinstallation? Is it permitted to manually manage a customized search engine?

I have been advised to utilize an add-on or create a dedicated profile.

What would be the most suitable solution in my case, and the one that will be the most effective and stable ?

It is unfortunate that mozilla-firefox does not appear to offer a 'blacklist' or exclusion list feature, as that would be the most direct approach to excluding the Wikimedia Foundation websites from the search results.

I thank you kindly for all of your suggestions and responses to come. ______________________________________________________________________________________________________________________

I am running Firefox 144.0 on kubuntu 24.04.3 LTS I have lost sound on Firefox. I have opened the same sites in Chrome and the sound is working fine. It's only in Firefox. I have tried several sites including Udemy, YouTube, and radio programs, no sound from Firefox. The problem started in the middle of a Jit.Si session. All of a sudden the sound disappeared. I thought that restart Firefox would help, then restart the computer would help. But the problem has continued. The speakers is turned on the volume is up, just not a sound from Firefox. What to do?

An hour ago I had all of my Firefox bookmarks. Ten years of meticulously filed and regularly culled references that I use multiple times daily. I rarely log out of Firefox sync, so that I can keep them up to date.

I now have no bookmarks and no tags.

For some context, two things just happened simultaneously. So, I'm not entirely sure which is the culprit.

1) Firefox just updated and I rebooted my computer.

2) Norton 360 updated sometime in the past two days. I attempted to familiarise myself with the new interface. Foolishly, given the track record of Norton-360-for-breaking-your-games, I ran the disc cleanup, which recommended I remove approximately 400 Mb of data. Norton stated this data was temporary files. If they were indeed my bookmark history, nowhere did Norton indicate they were bookmarks. Also, never have I encountered a disc cleanup that wholesale wipes bookmarks. I do hope Norton is not the culprit and this is just a glitch, because if this were due to Norton having no safety net for deleting an entire library of bookmarks - and they can't help me restore them - then that will be the final nail in the coffin for me doing business with Norton.

The suggestion to go to Import and Backup in Firefox, then click Restore, offers only the option of Choose file... - and then launches nothing.

Currently, I'm seeking any means of restoring my bookmarks. Any help would be appreciated.

I had presumed that I was taking reasonable measures through my Firefox Sync settings to protect my bookmarks and ensure they could be restored in the event of accidents. If these bookmarks are permanently lost, the amount of work I've just lost is quite the blow.

Edit No. 01: After writing this, my Bookmarks Toolbar is also now empty. Perhaps it had wiped earlier, but was merely waiting for a refresh to take effect.

Edit No. 02: Also, it seems I am unable to create any new bookmarks. I shall read the help suggestions relating to that now, to see if it's a relevant issue.

I received this download from Firefox today, July 22, 2025: xRqj7qhl.html - Size: zero bytes - Kind: HTML text . I've never experienced this before. Is it legitimate? Thanks