The two are the latest to publicly support Microsoft in its protest of a search warrant for customer emails stored abroad.
The CEO of the networking giant warns that revelations of NSA spying are undermining confidence in the tech industry.
The major security vulnerability affects networking equipment used to connect to the Web, the companies warn.
The Internet of everything will have five to 10 times the impact on society as the Internet itself, says Cisco CEO John Chambers.
The agreement marks the latest collaboration among tech giants. In the past weeks, Samsung also reached deals with Google and Ericsson.
The new patent cross-licensing agreement is designed to protect both companies from patent lawsuits.
A European court rejects Cisco's appeal to quash the merger as approved based on concerns that it would create a monopoly.
Cisco and Mozilla reps declare that the free, open distribution of the H.264 codec enables streaming of real-time online video from the browser without plugins.
Restaurants, hotels, retailers, and public locations will be able to get Wi-Fi equipment from Cisco and a check-in experience from Facebook.
The acquisition highlights the run on solid-state memory companies as data center players aim to speed up applications.