When someone says open source, the first company to pop in your mind is probably not Facebook. That would be a disservice to the company though as they are pushing open source just like the rest of them. The company started the Coremob W3C Community Group to push Web standards and they open sourced RIngmark, the company's browser test suite for building apps on the mobile Web.
The company open sourced Ringmark back at the beginning of April and they are already making loads of progress. They have changed the main page of Ringmark to now make it easier for developers to understand. When looking at the test results, it should be clear what use cases correlate with the tests.
The bigger change coming to Ringmark is that it's now integrated into Browserscope. This allows developers to see where each browser stands in regards to the three rings of Ringmark. The benefit here is that a new browser is added to the Web site's stats every time a new browser hits up Ringmark.
As for Facebook's Coremob community, Robin Berjon, the co-chair of Coremob, will start to review the tests that Facebook has submitted. Once all the tests have been processed and added to Coremob's Github, Ringmark will run off of these tests for its standards.
Coremob will also continue to contribute to the development of Ringmark. Community suggestions like version numbers and moving certain standards to certain test rings have all come from community engagement. Continuing this kind of engagement will shape the future of the mobile Web, at least as far as Facebook is concerned.
If you don't really understand any of this, but still want to have an impact on the future of the mobile Web or just the Web in general, hit up rng.io in your browser. This will run the Ringmark test and send the results of your browser to Coremob. I ran the test on all three of my mobile browsers - Android, Firefox mobile and Opera Mini - and found that the default Android browser was the most advanced of the bunch in terms of adopting Web standards.