Comodo code-signing certificates enable developers to sign Mozilla extensions or "Add-ons" for a wide variety of different operating systems such as Microsoft Windows, Mac OS X and Linux. Mozilla applications recognize XPIs as "trusted" when they are signed with a Comodo Code-Signing certificate.

XPI (pronounced "Zippy") is short for "Cross Platform Install." XPI enables Developers to create installer modules for their programs meant to enhance Mozilla applications such as Firefox, Thunderbird, Sea Monkey and Sunbird.

Comodo Code-Signing certificates verify and authenticate the entity that has created the XPI file, allowing end users to trust their execution. Most browsers will not accept action commands from downloaded code unless the code is signed by a trusted Certificate Authority.

An example of a trusted code-signing certificate, this one has been issued by Comodo.

"You still need to trust, but verify," said Melih Abdulhayoglu. "If you get a file called InstallMe.XPI, do you trust the person who sent it to you? What if it contains malware that might damage your computer? It is much easier to prevent your computer from allowing an untrusted file to install than it is to detect a problem and fix it after the fact."

Comodo is the second-largest issuer of high-assurance digital certificates. For more information about signing Mozilla Extensions please visit Comodo’s Knowledge Base for support on Code Signing.

About Comodo
The Comodo companies provide the infrastructure that is essential in enabling e-merchants, other Internet-connected companies, software companies, and individual consumers to interact and conduct business via the Internet safely and securely. The Comodo companies offer PKI SSL, Code Signing, Content Verification and E-Mail Certificates; award winning PC security software;  vulnerability scanning services for PCI Compliance; secure e-mail and fax services.

Continual innovation, a core competence in PKI, and a commitment to reversing the growth of Internet-crime distinguish the Comodo companies as vital players in the Internet's ongoing development. Comodo secures and authenticates online transactions and communications for over 200,000 business customers and has over 10,000,000 installations of desktop security products.

For additional information on Comodo - Creating Trust Online™ visit our website.