User Agent: Mozilla/5.0 (Windows NT 6.0; rv:6.0.2) Gecko/20100101 Firefox/6.0.2 Build ID: 20110902133214 Steps to reproduce: I was trying to find browser decryption capability of firefox but I could not find it. Now-days there is a great need for users to store their private files on a remote server and view their files using the browser, however when a user upload his files to a remote server he/she wants the file to be encrypted. When viewing the file, the browser must decrypt the file on-the-fly and present it.

There's no standard for this, but ddahl is working on a proposal (DOMCrypt). This should probably be closed as a dupe of some existing bug.

See https://wiki.mozilla.org/Privacy/Features/DOMCryptAPISpec/Latest and bug 649154