Firefox for Android Community Forum

I am using NextDNS as the system-wide DNS on Android (via Private DNS / NextDNS app). Other apps consistently use NextDNS as expected. However, in Firefox for Android, even after explicitly disabling DNS over HTTPS (Secure DNS), I still observe that some DNS queries appear to be resolved by other DNS providers. This behavior is intermittent and occurs on both Wi-Fi and mobile networks. My understanding is that when DoH is disabled, Firefox should strictly use the system DNS resolver. So my questions are: Does Firefox for Android have any internal DNS fallback or alternative resolution path even when DoH is turned off? Is this behavior expected by design, or could it be a bug? Are there any additional settings or advanced options required to force Firefox to always use the system DNS? Any clarification would be appreciated.

Everytime I try to click a link on Gmail it leads me to a FF page saying "Unable to connect. The site could be temporarily unavailable or too busy. Try again in a few moments. If you are unable to load any pages, check your device’s data or Wi-Fi connection."

I tried to deactivate all privacy and protection within the settings, but it behaves the same way. Am I missing something here?

It can be good, but mostly it's annoying. Thanks!

Hi When I enter an IP address from my network, Firefox does not connect to my network but instead tries to look up this IP address on the internet. For example, when I enter: 192.168.xxx.yyy/ or http://192.168.xxx.yyy

How can I access my local network?

I recently downloaded the newest firefox update and have had some problems with the entire firefox app. The most important problem is that it is making my Abbott myMerlinPulse heart monitor app not be able to send out info or receive info while the firefox app is in use. It has always worked fine until my last firefox update. Other problems are everytime you collapse a page to look at another open page each page you reopen must reload every time you reopen it. The add blocker apps or extensions that worked fine have stopped working nearly as well since I updated to the newest version of firefox. The add blocker is letting ads through on sites that it hasn't before now and when you put your browser settings in they can change even if you don't have a setting turned on. I keep having suggestions show up on my home search screen even though I have all of those settings turned off. These are all problems I've been experiencing since I updated to the newest version of firefox and definitely need to get the problem with the firefox browser and my heart monitor straightened out! Please help fix this or these problems because I really like using firefox and don't want to have to change to a different browser.

Since updating to v144.0.1 (distributed via Google Play) on OnePlus 5 with stock Android 10 (OxygenOS 10.0.1) Firefox initially performs as expected, but after a few days displays the 'connection has timed out' message when trying to access any URL (after a delay of around 45 seconds).

Issue occurs regardless of device connection to WiFi / cellular, other apps on the device have no issues with connectivity in both cases. PCAPDroid captures show DNS requests to the Android system resolver 10.215.173.2 with responses as expected, but no HTTP/HTTPS connections.

The issue persists across force stop, device restart, and clearing but is resolved by uninstalling and reinstalling until it recurs a few hours later. Issue also observed with beta build 145.0b7, but not yet seen using either Fennec 144.0.0 (Build #1440020) GV: 144.0-20251022155017 or with Nightly 146.0a1 (Build #2016122871), 6488d90a06c0b99c9f7000b8c0763c4f44253912, GV: 146.0a1-20251028041839

I been a Firefox since around 2010 (desktop) now on Android i even love this despite of heaviness in resources but efficient, there's only reason why i keep not using Firefox on Android, it is the mobile data bandwidth usage, even with strict ETP and pair it with ublock origin (easy mode or medium mode) and localcdn (that should help saves mobile data) but still consume high mobile data. Like just opening a comics style website brave uses obly around 30 probably 50 mb max but in Firefox it already consume around 100-120 mb.