Autofill doesn't work -- Vivaldi browser (Android)

Okay, but it can’t be a general problem, as I can autofill on Chrome without any issue at all (I just tested it – and my app is also on 2025.11.0).

For Chrome, it is important

  1. to enable the “autofill integration” (Settings → Autofill → Toggle “Use Chrome autofill integration”)

  2. and maybe still to set (enable) the following flag: #autofill-update-context-for-web-contents in chrome://flags (this is a proposed fix for an upstream issue)

If that doesn’t fix it for you with Chrome – and autofill still doesn’t work in any mobile browser for you --, I would tend to either check and toggle all settings again (maybe with the help of [Short Guide / Tips] Autofill on Android) or to to reset / reinstall the whole app and set up the app again from scratch (in case there was some “hiccup”)…