Unfortunately, Firefox on iOS still can't automatically clear cookies and cache for all websites except those specifically excluded. Which obviously is a big privacy issue in regards to being tracked.
Brave on iOS for example implemented this 2 years ago:
"Auto Shred lets you automatically delete data for specific sites [...] You can configure Auto Shred to happen when all tabs for a site are closed, or on browser restart. Auto Shredding on Site Tabs Closed means that whenever you close the last tab for a site, Brave will automatically Shred that site’s data."
Brave on iOS for example implemented this 2 years ago:
"Auto Shred lets you automatically delete data for specific sites [...] You can configure Auto Shred to happen when all tabs for a site are closed, or on browser restart. Auto Shredding on Site Tabs Closed means that whenever you close the last tab for a site, Brave will automatically Shred that site’s data."
https://brave.com/privacy-updates/30-shred-button/#:~:text=A...