Firefox Community Forum

I have been using Firefox for years on my Mac Mini and MacBook Pro, sync has never been a problem.

Now I inherited a Dell laptop, after reinstalling Windows 11 I installed Firefox and logged into my account as normal, and then switched back to using my Mac Mini. The next time I closed and then later reopened Firefox on the Mac Mini, Firefox had logged me out of every website, forgot my entire browsing history, passwords, bookmarks, everything. Its all gone with the exception of 4 of my 16 links on Firefox Home.

So I spent an hour fighting MFA, etc. on the websites I use the most, only to close Firefox and have it log me out and forget everything again. That is now its behavior, it loses everything every time I close the app. It does remember my toolbar settings, and those same 4 links on Firefox Home. i rebooted the computer and the problem remains.

Firefox is still logged into my account, it just doesn't sync or remember anything. Doesn't save cookies, history, nothing. Every time i relaunch the app, Firefox home is back in its default state

I also still have an instance of Firefox open on my MBP, I am now deathly afraid of closing the app for worry it will do the same. I also am afraid of using Firefox on the Windows computer, I absolutely cannot break this more.

How do I fix this this quickly and prevent it from ever happening again? I am getting absolutely buried in computer problems at every turn right now and nothing's getting solved. Every fix for weeks not only fails, but inevitably creates a new problem and I'm sorry but I'm going a little crazy and I really need a break.

Thank you.

Recently transferred from Chrome. My understanding was Firefox private browsing was supposed to work similarly to chrome incognito mode; once you close the browser, all local files are deleted and cookies are cleared.

However, with Firefox it maintains my logins. If I log into an account while private browsing and the close the browser, I’ll still be logged in next time I go to the website even if it’s days later (and I have never logged into this account in a non-private browsing window!)

I never had this issue using chrome incognito, so it seems to be a Firefox problem.

Is this just not something Firefox supports? Is there any way to prevent storage of cookies and private data?

I'm unable to login to account.apple.com on my laptop which is running Ubuntu 24.04.3 LTS.

I've launched Firefox using the `-p` option, created a new profile and then navigated to https://account.apple.com/sign-in and tried to login. I've attached a screenshot of the error message.

I had tried multiple things on my default profile, even troubleshoot mode, but I couldn't get it. I even tried useragent switcher to no avail.

I can login to the site using Chromium.

What else can I try?

I inadvertently installed 142.0 for Mojave 10.14.6- by mistake and now it starts up in the version 142.0 (which is not for Mojave 10.14.6) when I click on a link - I get an error and a log. I just open the correct version 115.26 everything works fine and I just have to copy and paste the url. I trashed everything my Library - Firefox folder and Mozilla folder- emptied the cache, history and cookies. Reinstalled Firefox from the Mozilla site, but to no avail. Hitting a link starts up in V. 142 and Firefox quits and throws an error log. What do I need to trash so this does not happen. Thanks

The box to uncheck "automatically trust 3rd-party root certificates" is greyed out, and I cannot turn it off. I do not want to automatically trust 3rd-party certificates. How to turn this off if box is greyed out?

I even tried to use the address bar suggestion to turn the "true" value to "false" but as soon as firefox reloads it is reset, & the way to stop that is greyed out.

Firefox is also saying "we've detected unusual traffic from your browser" every time I search, so I am concerned.

I was prompted to install a .js file while on a website unrelated to mozilla organization. I was taking a work call and distracted at the time and was dumb enough to install it before I realized this was not a normal update. Should I uninstall and reinstall firefox? My McAfee blocked the script from "trying to hijack one of [my] apps"

I have a fingerprint scanner and a slot for a security key, but I have never used a security key, either in the slot or a USB plugin.

When I try to go to Gmail, I enter my gmail address, and then Firefox pops up a screen wanting me to insert my security key, and there are no buttons to change how I verify my identity.

I've hunted all around for what setting in Firefox is causing it, but no luck so far. Ideas?

Hi, I am working on a website to see changes being made. I clear cache, cookies and temporary files and choose Everything. It is still showing the same data on the page. If I got to MicroSoft Edge, it is showing the updated text on the website page.

I'm using a desktop and Windows 10 latest update. Latest update of Firefox too. It used to work before update.

Would you please help?

Thank you, ToSt

I have noticed in the last two week severe problems with Gmail freezing while I am using Mozilla Firefox as my browser. Here is the message I got today:

style nonce="Zbhxq2KKGwv3dhsUaR9DSA">#loading {display:none}</style>Javascript must be enabled in order for you to use Gmail. However, it seems Javascript is either disabled or not supported by your browser. Learn more at our <a href="https://support.google.com/mail/bin/answer.py?ctx=gmail&answer=6557&hl=en&authuser=0">Help Center</a>.

HELP. I may have to switch browsers. My email is not usable!

Jon Finger