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Firefox 89.0.2 installer locks-up

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Hi, I upgrade Firefox to 89.0.2 from the previous version. The installer "locked-up" during the installation process. I am using Win 7 on a Dell Inspiron 64-bit laptop (2017) with plenty of memory. Never had problems before. The installer locks and I have to stop it via Windows Task Manager (setup.exe *32). I have reloaded the "Firefox Setup 89.0.2.exe" file several times, reloaded the previous version... no avail. It locks up. I tried to start the Firefox even if not fully installed, using Firefox.exe It stated that it did not close properly and to "refresh", which I did, the program browser started after saying "success", but then stopped responding (screen locked-up) while showing me the usual Firefox screen (i.e. with all my previous opened tabs, bookmarks...) After having deleted the program manually from its location, reloading it several times - the same issues took place. Can someone help, me? Thank you, Ciao, L

Hi, I upgrade Firefox to 89.0.2 from the previous version. The installer "locked-up" during the installation process. I am using Win 7 on a Dell Inspiron 64-bit laptop (2017) with plenty of memory. Never had problems before. The installer locks and I have to stop it via Windows Task Manager (setup.exe *32). I have reloaded the "Firefox Setup 89.0.2.exe" file several times, reloaded the previous version... no avail. It locks up. I tried to start the Firefox even if not fully installed, using Firefox.exe It stated that it did not close properly and to "refresh", which I did, the program browser started after saying "success", but then stopped responding (screen locked-up) while showing me the usual Firefox screen (i.e. with all my previous opened tabs, bookmarks...) After having deleted the program manually from its location, reloading it several times - the same issues took place. Can someone help, me? Thank you, Ciao, L

All Replies (4)

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Many have reported issues using the 64bit Firefox. Install the 32bit version from; Download Firefox For All languages And Systems {web link}

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Hi FredMcD, First, thank you for your prompt answer, I really appreciate you taking the time and effort to help me out.

I tried to remove the 64-bit version via windows 7 uninstall (it was not listed), I could not do it via Win uninstall). I manually emptied the folder Mozilla Firefox from (C:\ Drive\Program Files\Mozilla Firefox I kept the profile(s) folder and its content intact: C:\Users\Lancelot\AppData\Roaming\Mozilla\Firefox...

I loaded the current 32-bit update file as you recommended but the installer locks up after about ~15% load up. I was able to launch the program but again, it locks up looking for my profiles and when I direct the program to the profile folder - it states that my profiles could not be saved and locks up again.

I have used Firefox for over ~14 years and never had problems with automatic upgrades until the late-June upgrade.

Is there anything that I should manually remove from my computer in some other folder? I had not loaded/added any other software, program and extension at the time of Firefox' automatic update.

I have not been able use Firefox even though I can see all my previous tags when it locks up.

Thank you so much for your time and help sorting this out. Ciao, L

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Lancelot said

I manually emptied the folder Mozilla Firefox

Did you delete the folder contents, or delete the folder itself?


Let’s do a full clean re-install;

Note: Firefox comes in three or more folders on all computers. They are;

Maintenance: (Programs Folder) <Windows Only> Firefox itself: (Programs Folder) And two folders in the profile of each user on the computer for each Firefox profile for that user.

If you remove the Firefox folder, the user profiles would not be affected.


Download Firefox For All languages And Systems {web link}

Firefox ESR; Extended Support Release {web link}

Beta, Developer, Nightly versions https://www.mozilla.org/en-US/firefox/channel/desktop/

Install Older Version Of Firefox {web link}


Save the file. Then Close Firefox.

Using your file browser, open the Programs Folder on your computer.

Windows: C:\Program Files C:\Program Files (x86) Note: Check Both Folders

Mac: Open the "Applications" folder. https://support.mozilla.org/en-US/kb/how-download-and-install-firefox-mac

Linux: Check your user manual. If you installed Firefox with the distro-based package manager, you should use the same way to uninstall it. See Install Firefox on Linux; https://support.mozilla.org/en-US/kb/install-firefox-linux

If you downloaded and installed the binary package from the Firefox download page, simply remove the folder Firefox in your home directory. http://www.mozilla.org/firefox#desktop ++++++++++++++++++++++++++++ Look for, and remove any Mozilla or Firefox program folders. Do not remove the Mozilla Thunderbird folder if there is one.

Do Not remove any profile folders.

After rebooting the computer, run a registry scanner if you have one. Then run the installer. +++++++++++++++++++++++++++ If there is a problem, start your Computer in safe mode and try again.

How to Start all Computers in Safe Mode; {web link} Free Online Encyclopedia

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You are on 64-bit Windows 7, so why not install the 64-bit Firefox version ?

Boot the computer in Windows Safe Mode with network support to see if that allows to install Firefox.

You can find the full version of the current Firefox release (89.0.2) in all languages and all operating systems here: