how could I turn on automatic tabs deletion after I close browser?
only thing I found is tick at "Delete at browsing data at quit", won't it delete anything else if I only ticked "Open Tabs"?
Additional System Details
- User Agent: Mozilla/5.0 (Android 6.0.1; Mobile; rv:71.0) Gecko/71.0 Firefox/71.0
Yes, that option will clear all browsing data, including tabs. There is currently not an option to clear only tabs, but this is something that may be included in a future update.