The "Webmaker" events which run through September 15 aim to boost so-called digital literacy skills, including computer coding, designing Web pages, and creation of apps and videos.
The kickoff begins this weekend in Kampala, Uganda, and includes events in at least 368 locations, from New York and San Francisco to cities in India, Indonesia and several African countries.
"Digital literacy is as important as reading, writing and math in modern society," Mozilla Foundation executive director Mark Surman told AFP in a telephone interview.
Surman said the effort is part of a broader goal to help get more people around the world connected to the Internet, and to help them use it in more active ways.
More From This Section
The events tie in with the "maker movement," which according to Surman "is the idea that technology should be something we all can take control of, not something that is given to us by companies."
This is the third year of the campaign, Surman, said, and he hopes to double the participation level of last year of around 60,000 people. The maker parties are mostly locally organized with volunteers, with some technical help from Mozilla.
"In the end the broad majority of people are going to have a computer in their hands or in their pockets in the next few years, Surman said.
"We need to make sure those five billion people understand what the Web is now."
Surman was on his way to Kampala for "a 500-person teach-in" to launch the program. Mozilla promotes them as parties which help explain the mechanics of making websites and addresses issues such as privacy and data protection.