Firefox Community Forum

I have been an avid user of the Firefox browser on my PC for over a decade but a few days ago, when I tried to access a website on my Firefox browser, it would not connect me to the website. I have many tabs open in my browser and when I try to access any of the tabs, I get the same problem. There's a dot that moves endlessly back and forward in the tab while the screen remains blank. In the heading next to the website address it says "not secure", but it is saying this for all the websites that I was previously able to access and any new website that I enter. How can I fix this to access websites? I have tried restarting my computer but that has not fixed it.

Today firefox deleted my complete history with the latest update. My data recovery tools cannot find any old profile. I demand a solution, since you update without any warning or possibility to save the history/tabs.

In Chrome, I can search a full PDF whether I view it within an email, or as a PDF opened in the browser.

In Firefox, I can only do the latter - I can search the full PDF if the PDF is open in its own tab after being downloaded, but I cannot search the full PDF in the Outlook preview.

I do this every day for work, so this is a bit of a deal breaker if I'm unable to find a workaround. Does anyone have any ideas on how I can get around this?

Windows Defender uninstalled the Firefox browser because of a Severe security threat. Is there a threat to installing and using the Firefox application on Windows 11?

Hello! Appreciate the help I could get. It is rather hard to type when the letters are disappearing as I type it out. I will provide screenshots of my issues and hopefully someone could help me out. I just downloaded the browser and have no idea how to fix the issues. The tabs are constantly flickering in different colors. The letter are disappearing or merging together or sometimes written in bold, crossed out, or underlined. It is making it rather hard to use the browser haha, but let me know what else I can provide to help out identify the issue. THANKS!

Every time I access the web I get a report from Norton saying "Threat secured". It attaches every single website that I open. See attachment for some exmaples (only variabole part of message shown apart from first one).This is occuring 50+ times a day but does not occur using Edge, so it appears to be related to Firefox. PLEASE help. Norton have not helped with this. Thank you- Colin O'Brien

I am having trouble with Firefox when making a purchase or submitting a form. I get right up to the submit function and nothing happens. If I go to the same site with Edge, everything works fine.

I am using Malwarebytes and Facebook Container extensions. Are either of these causing the problem? And if so is there a work-around?

Hello. I frequently shop at particular store and have never had a problem.

Now, it's off and on. One order will go through with the help of their customer service (doing a direct purchase). Then a few weeks later I don't have a problem and can order without assistance. Now, once again, I can't purchase anything. Once my credit card goes through my address disappears. Then I add my address again and then my credit card is deleted. When my address or my credit card is deleted the order has in bold red letters telling me to add it again. I've tried Chrome after Firefox had issues but it had an issue too.

Is there something I can disable while I shop? I'm not having any problems with any other sites. Thank you!

Today, and never before has it happened, my Firefox web application abruptly crashed and closed itself while I was sending an email (earlier) and then searching for a spreadsheet in Google Sheets (just recently). Both times, the application also has disappeared from my computer by uninstalling itself I suppose - as I cannot simply reopen the app to pick up where I left off.

So, I've reinstalled it both times but each time - it resets my search history and pre-saved PINS and TAB GROUPS up top. So I have to recreate that each time. It's fine to do it once or twice, but it seems like something is going on here where I will have this problem be a daily or regular occurrence.

Any suggestions on how to troubleshoot this issue?

I'm using Firefox, updated to version 140.0.4, on my Windows 11 laptop. Since Edge is my primary browser, I normally only use Firefox for two particular websites that don't work well in Edge. Beginning in March 2025, I've had a strange problem with one of those websites. In certain situations, words or phrases pop up in text boxes, meaning that if I want to type something, I first have to delete the word or phrase. Since it's a game website (not a video type game -- actually contract bridge) and the game is somewhat time-sensitive, this is very annoying. The words and phrases are ones that are appropriate to the website (i.e., not random), and seem to be the same in each session. That's why I labeled this as a "clipboard-related" issue.

Clearing the cache seems to help for a short time, but the problem always returns. <Ctrl>-F5 also helps, but seems to work for some text boxes but not others. In fact, <Ctrl>-F5 works for one type of text box, the type that I use most often, for the remainder of that session. But if I use one of the other text boxes, it doesn't help.

If that isn't strange enough, there are two additional oddities: For the other text boxes, the ones that are unaffected by <Ctrl>-F5, if I continue to use them, they eventually stop popping up words and phrases, again just for the remainder of that session.

The other oddity is that I'm using the free version of the LastPass plugin, and every time one of these words or phrases pops up, the LastPass symbol (a red box with three white dots) also appears at the right of the text box. This is completely inappropriate, since these text boxes have nothing to do with logging in or passwords. For this reason, I'm going to try to contact LastPass to ask about the same issue. However, their support isn't very responsive, so I'm hoping that somebody in the Mozilla forum will have a solution.

As I said, the problem only occurs on this one bridge website, and although I've been using Firefox to access it for several years, the issue never occurred before March 2025.

Under Settings; Privacy and Security, my Passwords have disappeared, and at the same time all of my Bookmarks disappeared also.

While I was online this morning, all of a sudden my Mozilla tab went blank and the Firefox Icon on the bottom tray disappeared too.

All 3 problems happened at the same time.

This is a disaster for me.

Can the Passwords be restored? What in the world happened to my system?

Thank you.

I tried to change my password but could not find an acct key, don't even remember having one! This is a new computer and it worked fine until I say that you are showing a very old picture for my account and showing I'm still on Windows 10!!! That is VERY OLD and I've used Firefox for years!!! I changed from Windows 10 to 11 on 7-1-25. Someone has hacked my account I guess!

What to do???