One of my daily annoyances is having to OK pass Firefox’s Mismatched Domain Warning box. This comes up any time I connect via SSL (otherwise known as https://) to any of my hosted sites. This warning comes up because the certificate being used to provide the SSL encryption is a wildcard certificate for the actual server and not the domain I am connecting to. There is no effective way in Firefox to turn this feature off, unless you install Andrew Lucking’s Remember Mismatched Domains extension.

With RMD installed, you will get an option that states Don’t warn me again about this certificate for this domain. Checking the option box, will make the warning dialog go away the next time you visit the same url.

It may not seem like much, but after a while all those extra OK clicks add up and so I consider Remember Mismatched Domains a real time saver.