Yes! And many more email browsers! We have tested these templates extensively to make sure they work well across the board. This frees you to not worry about compatibility issues and just make a cool signature. That said, results can vary a bit depending on what email client you are pasting the signature IN to because some of them manipulate the HTML we generate before sending it out.
A signature template is something that can be "duplicated" for each employee. Each signature that gets generated from the template would have much of the exact same parts to it like company logo, office address, and website address. These elements are not editable by the employee. There are elements that can be customized per employee like their name, title, or cell phone number. With signature.email you can choose which fields are editable by the employee along with setting whether they are required or not.
For a few reasons, if you are working at a company then employees come and go, and you can continue to send out the link for new employees to generate their signatures at any time. It also enables us to host your uploaded images and keep our servers running.
Unfortunately not. That's the downside of the simplicity of this way of distributing signatures. When you update a signature template you will need to re-send out the link to your employees to re-generate their signatures and they can copy/paste the signature into their email browser again. Luckily it only takes a few minutes to do.