By default, these settings are stored in cookies, maybe you configured
your browser to not keep cookies?
Some browsers may need a special configuration to keep cookies for
files.
What I do is bake these settings into the SystemSettings tiddler - I
distribute my TWs to lots of computers via dropbox, and re-configuring
browser got old pretty fast. To do this you create a tiddler called
"SystemSettings" and put Key: Value pairs in it (do not tag this as
systemConfig btw - its not a plugin).
Example:
chkAnimate: false
chkAutoSave: true
chkSaveBackups: true
txtBackupFolder: twbackups
txtUserName: whatever