Hi! On Firefox mobile, some settings like disabling "Open previous windows and tabs" or using about:config aren’t available. To stop Firefox from restoring deleted history, try these steps:

Clear your history and cache fully from Firefox settings.

Make sure Firefox sync is turned off or check synced devices aren’t restoring history.

If the problem persists, consider reinstalling the app to reset settings.

Unfortunately, Firefox mobile has limited options compared to desktop. Hope this helps!

Hi Vikesprof,

Thanks for your report. We received several reports about this issue after the 143 release and our team is currently looking into it (see bug1990978).

We'll make sure to keep you updated once we have more info. Thanks for your patience!