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Long story short (as possible):

Windows 11 Home, Firefox version 135.0, File version 18.5.0.0, Product version 18.05

Opened Firefox first thing as soon as PC was turned on today. Immediately prompted for an update. It's Mozilla/Firefox. I didn't question it. I did the update and it asked me to download a file. "I trust Mozilla. OK". It downloaded a Firefox Installer.exe file. The same as the one I installed back in 2022 when I set up this PC. I noticed it was a duplicate because (1) followed the file name. "Odd, but okay...it's Mozilla/Firefox. I trust it"

Then I tried to use Firefox and no matter what website I tried to go to I got a "Gah. Your tab just crashed" on the page. It had "Restore crashed tabs" options but nothing worked. All led back to "Gah. Your tabs..." Thinking about the same Installer.exe file and its (1), I checked the Firefox update history. Nothing for today. I then opened the Properties of the original 2022 Installer.exe and the one today. All were the same except 1) - the 2022 file is 325KB and the (1) file from today is 364KB, and 2) - under Digital Signatures, the Digest algorithm is "sha1" in the 2022 file and "sha256" in the (2) file from today.

I didn't know this Ask a question/forum was here or I would have inquired here first. Instead I turned to Reddit's Firefox group using my phone before I did anything on my PC. I spec'd out the details of the day and was assured by two people to do a restart of Firefox. So I did. Yup, that seemed to fix the issue. And off I went with the stuff I'd originally had in store for my day. Until I had different/unrelated need to view my Downloads and I see a FireFox Installer(2) that must have crept in when I did the restart. There was no notification/prompt or request to allow. It just showed up and I wouldn't have known about it unless I checked my Downloads folder.

Until someone tells me otherwise, I'm staying off Firefox. Two .exe Installer files downloaded for a simple update? One which I authorized/allowed but the other sneaking in when I restarted Firefox? Not to mention the tabs not loading until I did the restart which if legit needed, Firefox didn't prompt me to do? That doesn't sound like normal Mozilla/Firefox behaviour. None of today's events do.

So...is this fishy like I think it is? Fishy or not, what's the best thing to do? I'm okay with computers but DEFINITELY NOT an expert. Hence me being here and asking what to do. Guidance needed. Help?

I wrote out the OS details and specs of the browser. I think that's all that anyone would need but if I'm wrong, don't hesitate to ask for more.

Thanks folks.

I used to run Thunderbird on a Windows 10 machine but I have now acquired a Windows 11 box. I tried to port my Thunderbird installation to the new computer by copying folders as recommended on the Web. I was partially successful. I can send and receive emails and my address book seems to be intact, but I lost one connection and most of the messages in the inbox for my main connection. I have lost all my starred and tagged messages and most of my sent and deleted emails. Disturbingly, the archive folder (which has many subfolders) for my main connection was not copied across. Can anyone tell me how to take a copy of an archive folder from the old machine and insert it in the corresponding position in the new one? Alan.

Hello, I have Thunderbird 128.6.1esr (64-bit) running on a new Gateway Windows 11-Home computer. Thunderbird does the download for the new version but when it tries to install the download it says "Installation Failed". Help and or Fixes to this will be greatly appreciated.

Also:

I have manually downloaded TB 128.7.0 to my laptop but don't know if installing it over TB 128.6 will work without messing up my mailboxes or settings.

Thanks to all very much, Cheers, Vinman52

Hello, my Firefox will not run no matter what I try.

I originally installed Firefox from the Microsoft Store and it worked perfectly for about a week. Then it stopped opening. When attempting to run the app, a loading cursor briefly appears and nothing happens. It is not visible in task manager processes.

Uninstalled and reinstalled several times - no luck.

Installed Firefox directly from website - still doesn't run, but it does pop up with a "crash report" window.

Can anybody help me out?

Dear support. Mozilla Thunderbird do not start. Instead of start program the message appear:

"For finishing update Thunderbird program is neccessary to restart computer. Do you want to restart now?"

Then I choose YES, and after restart nothing change.

Unable to connect to my email account on Firefox. Enter Yahoo/ATT mail and receive a message Oops, something went wrong. Try again later but this has been over a week. I can use the Microsoft Edge to get my emails but I do not want to go between different browsers for my personal emails and business emails.

I don't even have limited access to my internet because of this, so I cannot access the "future dates" to rename them as something perhaps botanical. In addition I am snowed in with late winter storms. My commputer is a Windows 7 Dell, (i.e. rather vintage) which I have always found fully adequate until now, and the problem is NOT with the computer.

It seems that every time Firefox updates itself my browser settings are reset, such as the search bar going to the top instead of the bottom, the "jump back in" section returning despite being turned off. I have to manually put them back myself every time

Err:15 https://example.com/apt stable Release

 404  Not Found [IP: 2600:1406:3a00:21::173e:2e65 443]

Hit:16 http://mirrors.cqu.edu.cn/ubuntu noble-security InRelease Reading package lists... Done W: http://http.kali.org/kali/dists/kali-rolling/InRelease: Key is stored in legacy trusted.gpg keyring (/etc/apt/trusted.gpg), see the DEPRECATION section in apt-key(8) for details. E: The repository 'https://example.com/apt stable Release' does not have a Release file. N: Updating from such a repository can't be done securely, and is therefore disabled by default. N: See apt-secure(8) manpage for repository creation and user configuration details.

I was on FF ESR with manual update - setting = "Check for updates but let you choose to install them" I'm on Windows 10 Prof 64bit

On 3 Feb 25 I upgraded to 128.6.0 by downloading Firefox Setup 128.6.0esr 64bit.exe and installing in F:\Firefox (as usual)

Today, (9 Feb 25) I noticed the FF icon in the Task Bar was blank, so I went to F:\Firefox\firefox.exe and reinstated it. I just happened to go to Settings > Apps and noticed I had 2 FF installed:

128.6.0 installed 3 Feb 25 and 128.7.0 installed 9 Feb 25. My FF About says 128.7.0 is installed and F:\Firefox\firefox.exe is dated 8 Feb 25

Unfortunately there seem no way to see where the source is located for these 2 app entries. A search of C: did not find firefox.exe

So why has FF undated today when it is on manual update?

MAYBE I accidentally clicked update to one of the periodic prompts in the top right corner. If so, surely it should not create another entry in the Windows Apps settings

And is it safe to remove one of these, presumably the earlier one, or will that remove both as they seem to share the same folder F:\Firefox\

Thanks for reading Alan

The install page for Thunderbird Android recommends using F-Droid . I use the button on the Thunderbird website which takes you to F-Droid. I try to install it but a pop-up message says F-Droid install was designed for an older Android device but my device is not new. I would rather not use Play Store for this install. Any suggestions would be most helpful. Thank you.