As of 38.0.5, this no longer is even an option, as they removed sslv3 support, see the reviews at https://addons.mozilla.org/en-US/firefox/addon/ssl-version-control/
On Fri, July 17, 2015 2:41 pm, Robert Drake wrote: > > > On 7/17/2015 4:26 AM, Alexander Maassen wrote: >> Well, this block also affects people who have old management hardware >> around using such ciphers that are for example no longer supported. In >> my >> case for example the old Dell DRAC's. And it seems there is no way to >> disable this block. >> >> Ok, it is good to think about security, but not giving you any chance to >> make exceptions is simply forcing users to use another browser in order >> to >> manage those devices, or to keep an old machine around that not gets >> updated. >> > Or just fallback to no SSL in some cases :( We have some old vendor > things that were chugging along until everyone upgraded firefox and then > suddenly they stopped working. The "fix" was to use the alternate > non-SSL web port rather than upgrade because even though the software is > old, it's too critical to upgrade it in-line. > > The long term fix is to get new hardware and run it all in virtual > machines with new software on top, but that may be in next years > budget. I've also got a jetty server (opennms) that broke due to this, > so I upgraded and fixed the SSL options and it's still broken in some > way that won't log errors. I have no time to track that down so the > workaround is to use the unencrypted version until I can figure it out. > > Having said that, it seems that there is a workaround in Firefox if > people need it. about:config and re-enabling the weak ciphers. > Hopefully turning them on leaves you with a even bigger warning than > normal saying it's a bad cert, but you could get back in. This doesn't > help my coworkers. I'm not going to advise a bunch of people with > varying levels of technical competency to turn on weak ciphers, but it > does help with a situation like yours where you absolutely can't update > old DRAC stuff. > > https://support.mozilla.org/en-US/questions/1042061 >