Firefox for Android Community Forum

I'm hitting a weird lag in Firefox on my Xiaomi 17 Ultra (HyperOS 3.1 / Android 16). When I tap a link, there's a massive "dead zone" where nothing happens for anywhere between 5 and 30 seconds. The browser doesn't freeze—I can still scroll the current page or open the menu—but the actual request for the new URL just sits there. After this delay, the page finally snaps and loads instantly.

It feels like a DNS handshake timeout or some weird socket hang.

Device Info:

   Device: Xiaomi 17 Ultra

   OS: HyperOS 3.1 (based on Android 16)

   Firefox version: [впишіть версію, наприклад, 124.0]

   Connection: Happens on both Wi-Fi and 5G.

What I've noticed:

   It’s intermittent but frequent.

   Already tried toggling "DNS over HTTPS" (DoH) in settings, but the hang persists.

   Chrome doesn't seem to have this specific delay on the same device.

   Battery optimization for Firefox is set to "No restrictions" in HyperOS settings.

Is there a known issue with the networking stack on Android 16 or specific about:config tweaks for HyperOS to stop the system from throttling background requests? Any logs I should pull from about:networking to help debug this?

I don't know from which version of FF it started exactly, but recently loading of websites starts after huge pause or fails at all, the same is with elements of web pages if those are located on different domain. This is only FF problem, other browsers load pages instantly. I have tried to delete cache, data and FF completely and reinstall anew, it doesn't help. I can only guess what causes it, probably some DNS connection issues.