Strange firefox issue

I use firefox as my browser.

Today it had decided to use uint64 GB of disk space and complained about a full disk.. Needless to say, I don’t even get near such an amount of disk space used by anything. I don’t have billions of websites open – usually it’s two or three, five at most.

What could be going on?

Sorry, what is uint64? Never had issues with Firefox. I only use it.

Unsigned 64 bit integer. Used in C

How do you know the culprit was firefox? Was it a firefox error message.

I have never noticed anything like that .

Yes. At first various web-apps and -sites started complaining about a lack of disk space, then I started looking and found websites were using quite a lot of disk space, according to firefox.

Keep an eye on your extensions if any.