Flag UI
While WebView supports toggling arbitrary flags on debuggable devices, we also support toggling a curated set of experimental flags/features on production Android devices. We expose these features as part of WebView‘s on-device DevTools. This is similar to Chrome’s chrome://flags tool.
Using the flag UI
This feature is launching soon! Until then, Googlers can follow instructions in this email thread.
Adding your flags and features to the UI
If you're intending to launch a feature in WebView or start a field trial (AKA Finch experiment), we highly encourage you to add to the list (ex. CL, CL).
Exposing your feature this way has several benefits:
- This improves the manual test process. Testers can enable your feature with a button click instead of an adb command.
- Typo-free: someone could mistype a flag or feature name in the commandline, but this UI ensures flag names are always spelled correctly.
- Because this works on production Android devices, test team can validate your feature on devices from other OEMs.
- You (and teammates) can dogfood your feature.
- If users or third-party app developers report bugs, this UI is the only way they can toggle your feature to help root-cause the regression.
See also
