Google Chrome has the Origin Trials system that allows developers to register for, test, and give feedback on experimental web platform features to Google, so that it may standardize and enable the feature by default eventually. Microsoft Edge based on Chromium now has its own Origin Trails system and is offering a couple of experimental APIs for web developers to join.
Microsoft Edge Origin Trials
Developers interested in joining Edge Origin Trials can head over to Microsoft Edge Origin Trials Developer console and see the experiments available and register for them without need to enable the flags manually in edge://flags page, which users do.
“Safely experiment for a fixed period of time and provide feedback on new platform features with Microsoft Edge Origin Trials,” the website says.
Currently, VirtualKeyboardPoloicy, PenButtonEvents experiment APIs are made available by Microsoft. Interested developers can register for them.
The Origin Trials framework is a great way for Web developers to connect with browser engineers and the Web standards community, it enables Web developers to experiment in new web platform capabilities and offers a medium where they can continuously provide feedback on various APIs shape, usability, and effectiveness after experimenting with them for a limited period of time in real production sites.
For more details, refer to the Microsoft Edge Origin Trials guide.
Microsoft says their Origin Trials framework is consistent with Chrome Origin Trials.
FYI, this is how a Chrome origin trial runs. The developer registers for the trial to be enabled on their origin for a certain amount of time and provides their email address and submits feedback to the Chromium team when the experiment ends.