Now You Too Can Contribute to Firefox...

...with your money:

This pilot allows developers to request an optional dollar amount for their Firefox Add-on. Along with requesting this amount, we’re helping developers tell their stories with our new “About the Developer” pages, which explain to prospective contributors the motivations for creating an add-on and its future road map. Since contributions are completely optional, users will have ample time to evaluate an add-on to determine whether or not they want to help a developer.

Some details:

How will payments work?

We are working with PayPal on this pilot to provide a secure and international solution for facilitating payments. Developers can optionally create a PayPal ID for each of their Firefox Add-ons. Users will be presented with a “Contribute” button that gives them the option of paying the suggested amount or a different amount.

This is a nice touch, too:

Why did you call this “Contributions” and not “Donations”?

At Mozilla, we use the word “Contributor” for community members who contribute time and energy to our mission of promoting choice and innovation on the Internet. Our goal is that users who contribute money to developers are supporting the future of a particular add-on, as opposed to donating for something already received.

Quite: this isn't just about getting some well-deserved dosh to the coders, but also about giving users a way to feel more engaged. Great move.