WiseStamp is a very useful FireFox add-on, that gives you a rich text editor to create your email signature. You can even edit, save, and apply rich HTML signatures to your web-based email accounts, including Yahoo!, Hotmail, and Gmail.
Once you are in your web mail account, WiseStamp adds a signature drop-down so you can choose which signature to use with the current email, or it can insert it automatically.
Summary of Features included in WiseStamp are as follows:
- Manually adds Signature at mouse cursor location
- Signature Rich Text editor
- Easy setup and configuration interface
- Easily Includes all IM ID’s and also support for icons
- Automatically insert your signature to your web mail services
- Preview while editing Signature
- Add logo or image to your Signature
The WiseStamp site offers an installation guide, tutorials, and a help section for users and supports Firefox 2 and 3. Its worth trying out.