Encfs is a program that can be used to encrypt folders, unlike other encryption methods this doesn’t require a file of a fixed size, so you can use the decrypted folder in the same way as a regular folder without worrying about space.
This tutorial will explain how you can use a plugin as a convenient way to use this tool.
This is a little extension to my previous post on encrypting folders. Using the same tools previously created, we will make it easy to store Firefox’s data encrypted, to be automatically decrypted when you run Firefox. This technique should be easily used for other web browsers as well.
Once setup, it will be no more hassle to use than running Firefox normally.