After trying different browsers on android I found Privacy Browser to be what I need. It have encrypted backups,Domain settings,jsless by default,Deleting all site data and Most usable UI. Only issue is It is based on webview and I am using system default webview as my device is nonrooted so how secure is to go this way?
Sorry for that behaviour and thanks for bigBro advice. I think I should switch to cromite as it give per site isolation. Btw Ff/cromite?