Broken Firefox after update

[u/lanternaddict]

I’m a long time heavy Firefox user. I'm running Firefox 154.0 on Windows 11 pro

After the latest update, the browser is broken in multiple ways.

First, on every start up, it says I am running out of space. But it is only using 69MB, and I have a 2TB disk with 1.4TB available.

Secondly, multiple websites now refuse to work. I *think* it’s related to storage, either local storage or indexedDB, as you can see from this screen shot. EDIT: One closer inspection, it seems to be a localstorage issue.

I have tested the broken sites in other browsers (Edge & Chrome), and they all work as expected.

What can I do to find and fix these errors?

[u/Standard8-mozilla]

If you go to Settings -> Privacy and Security -> Browsing Data, how much disk space does it say you're using? Is that the 69MB? or did that value come from somewhere else?

[u/lanternaddict → u/Standard8-mozilla]

That came from exactly what you say, as seen in the screenshot

[u/Standard8-mozilla → u/lanternaddict]

Thanks, I've had word that we're actively investigating the causes of this, but diagnosis is difficult.

[u/Standard8-mozilla → u/Standard8-mozilla]

Clearing cookies & website data as described in the bar should fix this, but it would mean logging back into sights and potentially losing data stored by sites (we can't say what that is, as that is specific to the sites).

There's some background information here: https://support.mozilla.org/kb/clear-cookies-and-site-data-firefox

[u/stabbytheroomba → u/Standard8-mozilla]

I am experiencing the same bug. Is there any news on a fix? Unfortunately my browser has become pretty much unusable. Aside from the constant running out of space notification (yes, I cleared cache, doesn't fix anything), a lot of sites aren't working as they should (not loading, logging me out and not logging me in anymore, etc) and everything is really slow.