Privacy Browser Android

I will have to look into how this is activated. I would imagine it isn't that difficult to do.

The command for requesting an incognito keyboard is IME_FLAG_NO_PERSONALIZED_LEARNING as described at https://developer.android.com/reference/android/view/inputmethod/EditorInfo#IME_FLAG_NO_PERSONALIZED_LEARNING.

It is quite easy to enable this flag on EditTexts like the URL bar at the top of the screen. However, it is nearly impossible to enable it on WebViews. This is because the WebView sets a bunch of IME options based on the type of field being edited, and there is no mechanism for overriding these settings to add IME_FLAG_NO_PERSONALIZED_LEARNING.

Google has done this with Chrome using a custom IME Adapter:
https://github.com/chromium/chromium/blob/55f44515cd0b9e7739b434d1c62f4b7e321cd530/content/public/android/java/src/org/chromium/content/browser/input/ImeAdapterImpl.java

Firefox does something similar, but it isn't clear to me if it is functionality that is publicly exposed in GeckoView.

I have not been able to find any browser based on WebView that implements this functionality.

I considered enabling this for the URL bar and leaving the WebView for later, but the user experience seems jarring that way and I anticipate it would lead to a lot of user complaints assuming that something is wrong with their system (I don't like to implement features that are half-baked).

I think I will hold off on this for a while. Perhaps Google will add controls to WebView for this. Otherwise, it will probably require waiting until the 4.x series with Privacy WebView to implement.