Firefox Community Forum

My virus software [ESET] continues to throw a warning for this site: https://smartadblock.net/febc/check.php, whether in FireFox or not.

The full message is this:

03/05/2026 12:34:31 PM;HTTP filter;file;https://smartadblock.net/febc/check.php?smarterBlockeruser=5a95aca1-0bc7-44aa-8530-b24c4663d295&smarterBlockerch=75779&smarterBlockerclck=KYYhsXKkLAiq86nMniI_QBbvIGZ_3n5L;JS/Redirector.SWD trojan;connection terminated;TRANZFORMATION\wally;Event occurred during an attempt to access the web by the application: C:\Program Files\Mozilla Firefox\firefox.exe (83D3842D579E5B6E2E5B055CCA4FB90933489C28).;08C31D6E8BB70C29570A45FB6BCACD9881E3C0DF;;S-1-5-21-500642325-2770745265-1048253706-1001;

This just started yesterday 3/4/2026

Can someone advise me on this?

Normally Ctrl+Shift+T reopens the last tab I closed in that specific window, but after the most recent update it reopens the last tab I closed in /any/ window. Is this happening to anyone else?

I have suddenly lost all my firefox data today.. after creating a new browser profile? I never bothered creating profiles and stuff when the update for that came and it seemed like Mozilla never forced me to create named profiles until today when I open it again after booting up and it suddenly asks me to make a profile for the browser and after I did I just saw that I lost everything, I have a firefox account that's sync to my mobile phone but I can't seem to sync it neither, my browsing history, bookmarks, and passwords are all gone and I've even checked the AppData/Roaming/Mozilla/Firefox folder for it and even the recycle bin but I can't seem to find a single trace of my data before firefox forced me to create a browsing profile for my computer. Hoping someone has a solution to this.

My bookmarks toolbar shows but it is blank. I had 60+ bookmarks on it. Why did Firefox trash my bookmarks?

Why did Firefox force me to create a new profile? I can get to my old profile, but the bookmarks toolbar is blank. The bookmarks showed for a while, then the toolbar went blank. What gives?

I have had all kinds of problems with Firefox the past several years, and I am about ready to can Firefox and go with Edge and Chrome. In my opinion, Firefox is a piece of crap, and I am fed up with it. I already have Edge and Chrome, but mostly use them as a backup when Firefox doesn't work right.

Is there any hope Firefox will get better, or should I jump ship with the other rats fleeing this despicable piece of junk? I have been hanging onto Firefox, because I am familiar with it and used to like it, and have used it for over a decade. But my patience is growing thinner.

WebRTC DataChannel worked perfectly in Firefox 147 and earlier, but after upgrading to Firefox 148, send() throws InvalidStateError immediately after onopen fires. Same code works in Chrome and previous Firefox versions.

const dataChannel = pc.createDataChannel('kvsDataChannel', {

   ordered: true,
   maxPacketLifeTime: 3000

});

dataChannel.onopen = () => {

   console.log('open, state:', dataChannel.readyState); // Shows "open"
   try {
       dataChannel.send('hello'); // Throws InvalidStateError
   } catch (e) {
       console.error('Failed:', e.name, e.message);
   }

};

Error: InvalidStateError: An attempt was made to use an object that is not, or is no longer, usable

Environment: Firefox 148.0: Fails OS: Windows 11 Firefox 147 and earlier: Works

Question: What changed in Firefox 148 that broke DataChannel send()? Any workaround while this gets fixed?

Firefox installed a new release and now all my bookmarks, add-ins etc are gone. I went to About:profiles, but I when I launch the other profile that is there it still show the new profile

Ok, This latest version of Firefox is really Bad. It hangs on a lot of my online login accounts. Important things like my Amazon Chase Banking App. My Subscription access to HeyGen logs in for example but it won't work with features like creating your avatar. There is a LOT wrong with the current build.

Firefox keeps forgetting my bookmarks, so I uninstalled and reinstalled Firefox. After reinstalling, Firefox defaulted to my wife's profile. I then tried to recover an old backed up profile using sync. I selected the right profile, but Firefox reports there are no compatible files in any of several backup file folders.

I just reinstalled my OS (Windows 11), and installed Firefox, logged in, and just couldn't believe my eyes. Everything is just gone. Passwords, history, everything. Why then Firefox Sync is using email and password if it doesn't have any cloud storage for passwords and doesn't even work like chrome? Should I install Firefox on my iPhone to regularly sync two devices (manually), to store passwords on another device, then sync back?

I'm unsure if this is the right place to be asking this as I'm new to the Mozilla forums, but I've noticed an issue with how text aligns when printing in the latest version of Firefox (148.0), specifically I'm using the 64-bit installation on Windows - I cannot confirm whether or not this issue can be replicated on other environments as I do not use them.

I noticed this issue when trying to print an order summary from Shopify - both in preview, physically printed sheets, and PDFs, the shipping/billing addresses had their lines 'smushed' together, rendering them illegible.

Was there a tweak in the latest update affecting how Firefox handles text, specifically in regards to its alignment, when printing from a webpage?

At first I thought this was a Shopify issue (as is the case more often than not), but after trying this out on different browsers (namely Chrome and Safari - boo), I could not replicate the issue.

I would share screenshots of how the issue presents, however I cannot do this without being in breach of GDPR and I do not want to share customers' sensitive information.

Any help would be much appreciated, thanks in advance! :)

When firefox releases an update I find out when I try to use my browser for something. Im on the fly paying a bill and I want to get it done but oh its firefox update time and I dont have an instant choice stop that. I have first tell my security system that I dont want to make changes to my software at this moment I wanbt to use the browser for something important to Me. But still firefox wont let me. I have to wait till it processes my denial then comes the irritatin popup about download or dismiss and I have to respond to that wasting more critial moments for me then after a few more precious to me moments firfox will open and let me use it. This irritates the hell out of me and the worst part is if I dont waste more of my time performing the update when firefox chooses it will shanghai my browser all over again every time until I update. The worst thing is sometimes updates comie in rapid succession. Major irritation. How do I stop this? whats the work around here? I want to up date when it suits me not when it suit firefox.