Firefox Community Forum

Since FF 09/15/26 update manage cookies and data sites no longer will delete items. I click the 'save changes'. and that's it. All the cookies and data are still there. Hopefully a fix will be soon?

Hi,

I am in the process of migrating between systems. I have my desktop with Firefox, I use some multi account containers, I clear cache and cookies on browser close and I have some exceptions to not clear cookies, as I want to stay logged into my accounts. It worked fine on my desktop.

Now, I tried to do the same for my laptop. I turned in account sync and add on sync, my browser settings and containers are indeed synced. But the exceptions are not synced, so I tried setting an exception for some of the sites like my desktop, logged in, closed browser, and I am not logged in anymore. Nevertheless, the exceptions are still remembered.

Some details:

   On my PC, The exceptions are both in the Browsing Data section and in the History exceptions. So I tried setting the exceptions to both on my laptop too, still no success.

   On my desktop (where it works), I don't use the "Always use private browsing mode" option, and on History->settings "Cookies and site data" are checked, and "Site settings" is not checked.

Can anyone please help me troubleshoot this? I really don't think it should be that hard, maybe as Firefox updated it became bugged or something?

Thanks in advance.

Every time I close Firefox, I lose cookies for banking, financial and news access requiring me to go through a lot of effort. re-establishing cookies with painful waste of time, I am hoping a change to the config files will override user settings that delete everything when firefox closes.

Failing that, can you designate which cookies are permanent anywhere in your application?

In the past couple of weeks (say Sept 2026), Firefox has started signing me out of everything when it closes or updates even though 'clear browsing data' is UNchecked. What else can I do to stop this?

I am having an issue where Firefox sometimes keeps showing an older version of my website even after I update CSS or JavaScript files. A normal refresh does not always show the latest changes, but clearing the browser cache fixes the issue.

Is there a way to refresh or clear the cache for only one website without clearing all browsing data? I would like to keep the cache and login data for my other websites.

It happened again. My firefox must have removed all of my cookies because I had to sign back into all of my regular websites--Youtube, Yahoo email, Facebook, Twitter, etc. This has happened once before. Firefox deleted all the sign in cookies? Not sure what exactly is happening; I only know that I had to sign back into all my regular websites. This seems to be happening every few months now.

you have to delete over 5 times to get history and cookies to clear. Selecting "everything" never removes everything :( Used to be the best for privacy now its seemingly deceptive..

Hello,

in Firefox 154, it looks like there are 2 places if you want to create exceptions to clearing data when exiting.

1. In about:preferences#privacy under "Browsing data": "Exceptions - cookies and site data"

2. and in about:preferences#history: "Exceptions - clear history on shutdown"

The 1st place allows more than just an exception to clearing data on exit, it allows negative exceptions too (i.e. "block" and "session-only"), whereas the 2nd place does not have those, and is only an exception to clearing data on exit.

having both of those dialogues is pretty confusing and seems duplicative.

what are the under the hood differences between them, and which one should be preferred for exceptions to clearing data on exit?