User Agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:109.0) Gecko/20100101 Firefox/117.0

Steps to reproduce:

Firefox
-> Tools
-> Privacy & Security
scroll down to "Cookies and Site Data"
and read what it says. In my case, the Cookies and Site data were taking up 17 GB of disk space, but Firefox reported 17,179,869,185 GB = 17 BILLION GB of disk space being used.

Actual results:

In "Cookies and Site Data", the Cookies and Site data were taking up 17 GB of disk space, but Firefox reported 17,179,869,185 GB = 17 BILLION GB of disk space being used.

Expected results:

The Units - GB - are wrong. It should be 17 GB not 17,179,869,185 GB.

17,179,869,185 GB
= 17,179,869 TB
= 17,179 PB
= 17 EB = a LOT of disk space !!

The Bugbug bot thinks this bug should belong to the 'Core::DOM: Security' component, and is moving the bug to that component. Please correct in case you think the bot is wrong.

Jens: is this part of the storage team that makes this calculation? "DOM: Security" isn't right, but the generic "about:Preferences" component wouldn't be right either

Yes, this seems to be a bug in usage calculation.