GMail signatures

There are a couple of ways to add a signature to GMail messages:

1. The built-in signature feature in Settings. This appends your signature to every message you send, which is not necessary and it does not support HTML in signatures
2. Blank Canvas GMail signatures, which is a Firefox addon. You can choose This has not been completely stable in my experience, only works in Firefox and you have to set and edit your signature on every computer you use (2-3 in my case)
3. WiseStamp, which is also a browser addon, which works in both Firefox and Chrome. I haven’t tested this one out, because it appears there is a built-in feature in GMail which you can use, so you don’t need an addon at all:
4. Canned responses, which is a GMail Lab, can be found in Settings > Labs. It is primarily meant for those irritating automated replies that don’t answer the question you asked, but you use it for you signature(s) as well

Canned responses support multiple HTML signatures you can choose to append to messages or not, before or after typing your actual response. Signatures are stored in GMail itself, so it immediately works in all browsers.

It took me quite some time to find this out, so I thought I should share it.