Using LineageOS 16 (Android 9) and the latest NoSurf from F-Droid. Default browser is Firefox Preview. "Open links in external browser" is enabled, but links still open in the internal webview.
This might just be an issue with Firefox Preview. Having installed the latest stable Firefox build and setting that to default browser, the problem went away.
Using LineageOS 16 (Android 9) and the latest NoSurf from F-Droid. Default browser is Firefox Preview. "Open links in external browser" is enabled, but links still open in the internal webview.