Use SSH in Firefox with FireSSH
After it is installed, you run FireSSH by selecting Tools -> Web Developer -> FireSSH in the Firefox menu bar. You will then get prompted for SSH credentials as depicted below.
To import SSH settings in .dat file format, at the FireSSH login prompt choose Tools -> Import.
When you initiate an SSH session with a host for the first time, you get prompted regarding the server’s key like so.
When you get your authentication squared away, you are presented with an SSH terminal within a Firefox browser window.
To configure FireSSH’s options, go to Tools -> Add-ons -> Extensions -> FireSSH Options.