I wanted to give Firefox for Android a try (I'm a long-time Chrome user), but after installing it from the Play Store, I discovered it refuses to load any website, always showing this security warning that cannot be ignored: This happens on all sites and only on Firefox for Android, the same sites load correctly in Chrome and also load correctly in Firefox running on a Windows computer that is on the same network as my Android device. Any clues as to why this is happening? I'm running Firefox 105.1.0 on Android 12.

I noticed for a while using the app TrackerControl that Firefox connects to Facebook sites very often while I surf the web, for example a simple search on Google, or a search on Startpage.com which sites don't have anything in their pages linked to facebook sites. I have set TC to block trackers in Firefox by default. ### Trying to find out when this occurs I thinked that this happens in general until now. In fact before writing this question I did some tests and I noticed **one probable behaviour causing** connections every time, that is if I search a string through a Firefox's search engine in search bar. This happens both with predefined engine (google) and with custom one (startpage). This tests was done when I've just opened Firefox in private browsing so that there wasn't other working tabs (and there was no loaded facebook tabs opened in normal browsing tabs). Here is TrackerControl after a Startpage search (from bar) where Facebook domains result blocked 5 seconds ago: Here after a Google search (from bar) where Facebook's domains result also blocked 5 seconds ago: *Note:* probably (as I remember) instagram's domains are there because I visited it once and it wasn't blocked yet. The relevants domains here maybe are: *scontent-fco2-1.xx.fbcdn.net* , *scontent.xx.fbcdn.net* and *static.xx.fbcdn.net* The domains contacted are probably all that appear in the screen under Facebook (see 2nd update). But I noticed just sometimes that connections happen also if I only interact with firefox's bar and digit something. Than if I just use a page like this and I don't touch search bar, connections to facebook seems to not occurs since TC indicates that some minutes passed after the last connection. But now after about 30 minutes another connection was made even if I didn't touch search bar. ### Who is the actor This behaviour is strange because it seems that probably is acted by Firefox itself. I've never heard or read that Firefox communicates with Facebook and there is no reason, but only with Google for scanning URLs and downloads. Also after searching in google there are no results. I don't have strange extensions. Moreover I have the ext. *μBlock* and *Noscript* that should block Facebook together because I explicitly set the first to block Meta's websites in general and the second to block other non website's scripts by default. So those connections in TC should have never occured, except I think if they are made by Firefox, at which level every extension can't operate. Read 1st update. The problem occured for months, but I postponed this question until now. This means that I noticed this also with older versions of Firefox before the present since more or less one year ago or more. **Note**: TrackerControl app says explicitly that it doesn't support blocking trackers in browsers yet, but I read I could use it anyway. ### My complete "configuration": - Firefox from Play Store, version *114.2.0* (for successive versions see bottom) - Extensions: *uBlock Origin*, *NoScript*, *Decentraleyes*, *Google search fixer*, and other non relevant here but installed noramally from Firefox - I have search suggestions disabled so no contacts should there be while texting in bar. Moreover I have studies disabled and just "technical data and usage" enabled. - TrackerControl app installed from F-Droid, version *2023.01.31-fdroid* - Android version 8.0.0 (I don't think is relevant) - I forgot to say that I have from the beginning Avast Antivirus Installed, that should protect. I'm not an expert of TrackerControl. I hope that someone knows what is the reason because is not a good thing. Does Firefox do this in its code (I don't think) or is just an error of TrackerControl (It's not, see Update 2) or a malware? It's too invasive. Has someone experienced this or can reproduce this? Thanks in advance. ### Versions: I've checked if connections to facebook continue in newer versions and I noticed that them happened after every search in these ones: 115.2.1, 116.0.0(this not sure if typed correct), 116.2.0, 116.3.0, 117.0.0, 117.1.0, 118.1.2, 119.1.1, 120.1.0 (current) Just in version 118.1.1 I noticed very rare connections also after days, but they occurred. Generally it continues with every successive updates. --- ### Updates: - As asked in comments, disabling all extensions and restarting Firefox (also rebooting Android) doesn't eliminate the problem, connection persists after a search on the bar. - I tried app NoRoot Firewall in place of TC (both are VPN based); it gived connections to facebook (and also to instagram) in log right after a search. But Firefox connections was all allowed in rules of NoRoot Firewall. After I re-enabled TC (disabled NoRoot F.), which blocked facebook, those connections was more sporadic or absent for some time. But after one day of use (always with TC block activated) the problem returned as before, so the browser tries to connect at least after every search in bar. - I want to note that those facebook's domains which I look to often, are under "Essential" section. There are also other fb domains under "Social networks" which is tried to connect to after a search. - **Important**: All this happens on that Firefox I have installed; in fact if I install a new one all this things don't happen. *So it is a malware that changed something in Firefox that persists with updates? Is it possible? Or maybe in the past I have installed accidentally an extension or taken a malware during surfing, that changes Firefox persistently?* If this is the case Firefox didn't protects itself or Google/Android OS or Avast didn't protect the phone from malware inserting in an application (which should be write protected). In fact I never rooted my phone, but the support ended since some years from the first post so something utilized a vulnerability to write where it should can't do? I have seen that the Knox bit (I own a Samsung) has not been changed from default value, so the malware has never rooted the phone (if this bit works). - For the persistent changes I thinked there was some about:config entries modified. So (I figured out how to do and) I searched in all entries some links related to fb but I didn't find anything. So I think is some strange malware from fb more deep in the application.

I have a passing interest in linguistics and sometimes do some reading up on the topic in my spare time, and lately I've noticed that whatever font Firefox is using on my phone just doesn't support important parts of the IPA and certain rare CJK characters, and it doesn't seem to be falling back (though I'm not sure if missing ligatures are normally a fallback situation--but ligatures are mandatory for Chao tone letters, not just an aesthetic thing like they are in standard text). I'd like to install a font that does, but I can't seem to find any information for how to do this--search engines apparently just think I'm trying to change the font used in the system UI, and the google play store keeps pointing me to weird custom keyboards. So, my question is: how do I get a font in the correct place for it to be available, and how do I set up Firefox android to use that font as a fallback or even by default? It's definitely not a case of the website dictating a font that doesn't support it--I can load the same page on my laptop and it renders fine. If it's relevant, my phone is a Kyocera Duraforce Ultra E7110. ---- [Here's](https://en.wikipedia.org/wiki/International_Phonetic_Alphabet#Computer_support) a (section of a) page that renders wrong, which also happens to be a section about font support for the exact characters I'm having issues with. There's a test sequence in the caption under the image on the right. Specifically, on my phone, the sequence ˨˦˧꜒꜔꜓ renders as , instead of how it should render, as . (Most fonts support the first half of that, the standard-orientation tone letters, but many do not support the reversed ones--including the one stackexchange uses by default, it would seem.) As for android version, here's what my phone says: - Android version: 12 - Android security update: January 1, 2025 - Google Play system update: February 1, 2025 - Baseband version: HI.2.0.c3-00516-1 (that might start with Hl, I'm not sure) - Kernel version: 4.19.157-perf - (Kernel version second line:) #1 Wed Jan 29 02:19:57 JST 2025 - Build number: 5.230VZ

I use Firefox on Samsung Galaxy S21 with Android 14. When I put my finger on the screen it often (3-4 times a day) shows the refresh icon and when I remove the finger the page refreshes. I don't swipe. I haven't found a way to abort the refresh or to reliably reproduce this behavior. I also never noticed this when I was using Pixel with Android 12. Is this a Samsung feature? How to disable it?

I recently started seeing this popup when I click on the View more comments button at the end of a conversation in reddit when browsing on Firefox Mobile. It says "Log in to view the conversation". I'm not sure if it's ordinary JS, or the browser is showing it, or it's from the system. I've disabled the "Google Account sign-in prompts" described here - https://www.howtogeek.com/735152/how-to-turn-off-the-sign-in-with-google-prompt-on-websites/ , so it shouldn't be that. How can I disable it?

I just got a new phone, a Pixel 9 Pro XL. Warhorn.net main page loads without CSS, and all the other pages are blank on my phone, even if I request the Desktop site. This only happens on Firefox on this phone, it works without a problem in Chrome on the same device, and in Firefox on all of my other devices. All other sites seem to load just fine. How can I fix this?

When you click a link in many apps, the URL already comes with all sorts of info about your device, and since I'm a little too conscious about that, I would like to inspect each URL before Firefox sends that request for god knows where, but click super fast in the X button seems too crude (and probably ineffective) for me. Is there something in about:config or somewhere else for that?

This may be a ridiculously simple question, but where is the bookmarks list in Firefox for Android? I'm looking at the interface on my Galaxy Tab 10.1, and I can't find the bookmarks anywhere. They're not available when clicking on the top right corner. They aren't available anywhere else. The only place I can find them is when I open a new tab, I get an interface which shows my bookmarks as one option, along with "History", "All Pages", and "Desktop". Surely I don't have to open a new tab every time I just want to go to a bookmark? This is one of those things that's so simple it seems they haven't even bothered to mention it in documentation. At least, not that I've seen.

I'm using the Firefox app on Android 14 to access email services. I don't have any dedicated email apps installed. - I'm doing everything through Firefox. Is there a way to make Firefox run in the background so that when I receive a new email, I get a notification? Importantly, the notification should be sent by Firefox itself, perhaps with an add-on or similar mechanism. I'm looking for a solution that works entirely within Firefox, without relying on external email clients. Any ideas or suggestions would be greatly appreciated.

A lot of settings on Firefox for Android need about:config, but I cannot open it by typing in the address bar. Here are the screenshots. ||| |-|-| |Waiting 15 seconds after I typed about:config in the address bar and pressed Enter|The version of Firefox app (v88.1.3)| What am I doing wrong?

From [this question about Firefox in general](https://superuser.com/q/1113362/435295) I have tried everything except the custom css answer. How can I force enable Reader Mode in the Android app? Even the about:config page won't open. Maybe it's at a different location or something.

When I click a link in another app, say "Gmail" for instance, it opens up an in-app browser to view it. When you click on the top right menu bar, you can see that at the bottom it says "Powered by Chrome". On another older phone, it somehow used to be "Powered by Firefox". I don't remember exactly how I enabled it. How should I enable it in other phones?

I'm using the Google News feed (swipe left from home) a lot. However, I want to open the respective links using Firefox instead of Chrome (mostly because I can disable autoplay on Firefox, but not on Chrome I think). I tried looking through the options as well as the internet, but I haven't found a way to open these news items in a "custom" browser. Is it possible?

For a specific website, I clicked on "Show desktop version" link. Unfortunately the desktop version is so broken I cannot use it even to click on "Mobile version" link. Because the website remembers the setting using cookies, I need to clear that specific cookie to get mobile version of the website back. When I use "Guest mode" in Firefox, the website works which confirms my hypothesis that cookie causes my problems. Therefore the question: How to delete one specific cookie in Firefox on Android? I tried installing some plugins, but all I got was "Installation failed" toast message on screen.

How can I turn disable redirects in Firefox for Android? Here is a solution that works for desktop Firefox: https://superuser.com/questions/874819/prevent-automatic-redirects-in-firefox Unfortunately the **accessibility.blockautorefresh** option is not present in Firefox for Android.

I would like to transfer my Firefox mobile bookmarks to my desktop and would prefer doing it without using Firefox sync or any cloud-based extension. Is there a way to export Firefox for Android bookmarks to an HTML file?

As of October 2020 I can't seem to find a working add-on/extension for Firefox on Android. [Tampermonkey's page](https://addons.mozilla.org/en-US/firefox/addon/tampermonkey/) says the add-on is not compatible with Android, but I think it used to work fine a while back. Is there any way to install userscripts on a current version of Firefox for Android (including beta or developer editions)? If current versions don't support such extensions, and the only way is to install an older package (not recommended due to potentially unpatched vulnerabilities, I know), which is the latest package version I can use Tampermonkey (or a similar) extension with?

I've had trouble with video playback using Android Kiosk. I gather it's because of the apps reliance on WebView. Firefox is playing the videos well. Is there a current Kiosk app available based on GeckoView? Or is there an effective way of putting Firefox in kiosk mode?

This is a follow up question related to this answer . In short: I am importing the self signed Root CA certificate into android system via Settings -> Security -> Trusted Credentials -> install from SD path slightly differs on different android versions. Then point any browser (tested with Firefox, chrome and opera) to the secure (java script based) resource and I receive a socket error. The resource is an index.html with js web-socket logic to securely connect to a mosquitto broker. If I on the other hand point the browser to "https://myserver :" I receive a privacy warning, can continue unsafe and this somehow sets a cookie or other storage thing thus I am able to do future requests over the js based secure resource. It feels, that browsers on android do not make use of the system's user imported CA certificates although they are listed in the trusted certificates "user" tap and in the trusted credentials area. Tested with android 7.1.2 and 10. All desktop browsers work fine, tested on ubuntu / mint & raspi. How to accomplish browser based TLS requests on android without accepting unsafe privacy risks? **Additional test:** I've tested the same thing on a ios 13.3 IPhone 7, importing the CA certificate, putting the secure resource on a proper web space since local file access isn't possible on ios. Worked out of the box. So it seems to be a real android issue. It might make sense to put this question to an android space. Could someone make a suggestion please? **Further research:** Here is a detailed explanation, on how to get a custom certificate into the system's certificate section. But to be honest, that's not a usual way to go. Root access is not for ordinary mortals plus it might not work for more recent android versions. User certificates are for android applications written by your own. You can have a view lines of property settings in app.config to work with your self signed user certificates. Chrome browser and others on the other hand are kind of system applications or applications from vendors not being made to be aware of specific user certificates. And that's the only valid reason, why it will not know of certificates in the user section. It only knows of system certificates. So the only way remaining, seems to be making your own application or somehow recompile a whole browser application configuring it to look for user certificates. This is quite cumbersome and unsatisfying, since the web would give you all you need on any device, except android of course, which forces a detour.

Title says it all, pretty much. A quick Google search (surprizingly) did not return any pertinent results. I guess it might boil down to copy-pasting some system folders/files from one Android installation (via USB-C, via a PC) to the other. But I prefer not to be the guinea pig here... (PS: I'd rather not have to revert to Firefox's "sync"-feature for various reasons... anyway, it's obvious that "sync" would work, but that's not the question here...) ---- EDIT: - My phone(s) aren't rooted. - Neither a 3rd-party app, nor a cloud-based solution is what I'm interested in. --------- Related link(s): seems like the transfer-via-USB-route would require a **rooted** phone :( - https://android.stackexchange.com/questions/129911/how-can-i-access-the-folders-where-firefox-mobile-stores-its-application-data - https://support.mozilla.org/en-US/questions/949785