Hello, I have a reproducible issue on Firefox Beta for Android on my POCO X6 Pro 5G running HyperOS / Android 15. When tapping mailto: or tel: links in Firefox, nothing happens. No app opens and no chooser dialog is shown. The same links work correctly in Google Chrome, so the Phone/Dialer and Email apps are properly registered with the system. This appears to be related to Bug 1988946, but it also affects Android 15 on HyperOS. --- Steps to reproduce 1. Open Firefox Beta on a POCO/Xiaomi device running HyperOS. 2. Visit any webpage containing a tel: or mailto: link. 3. Tap the link. --- Actual Result No action is triggered. No Intent Resolver popup appears. No dialer or email app is launched. --- Expected Result tel: links should open the default Phone app. mailto: links should open the user’s email app. If multiple apps are available, Android should show a chooser dialog. --- Device Information Device: POCO X6 Pro 5G OS: HyperOS, Android 15 Firefox version: Firefox Beta 146.0b4 Build: #2016126791 GV: 146.0-20251117130030 AS: 146.0.1 Build date: 2025-11-17T13:00:30 --- What I have already tried Enabled “Open links in apps” in Firefox Reset Firefox default preferences Reset Phone (Dialer) defaults Granted all special permissions (background activity, pop-ups, etc.) Tested Firefox Stable and Beta Cleared app cache/data Rebooted device Verified that Chrome opens tel: and mailto: links correctly on the same device --- Additional notes In HyperOS settings (“Opening links”), Firefox does not receive supported link types. The Phone app does not appear in “Opening links”, but it works fine with Chrome. This suggests a compatibility issue between Firefox’s intent handling and Xiaomi/POCO HyperOS on Android 15. --- Conclusion This issue is reproducible 100% of the time and affects basic link handling functionality. I am available to provide logs or run additional tests if needed. Thank you!