[sebstefan]

With Firefox Mobile on Android, you can confiure webviews to open as Firefox webviews as well, and my extensions seem to be running because I don't see ads there. They're still webviews of course, you don't get the tabs, bookmarks etc. Just webviews with extension support.

[kevincox]

There used to be an option to redirect the Custom Tabs API to just open a regular Firefox tab. I loved that option as it replaced a reduced functionality API with the full thing. Too bad it got lost in the great fenix rewrite.

[aragilar]

That's what I do as well, but still sometimes it's chrome that opens, and so a "always really open an actual browser, never a webview" would be preferrable (and more recognisable when preferences are ignored.