Search Support

Avoid support scams. We will never ask you to call or text a phone number or share personal information. Please report suspicious activity using the “Report Abuse” option.

Learn More

"Firefox can't update to the latest version" appears after updating.

  • 13 replies
  • 1 has this problem
  • 3 views
  • Last reply by cor-el

more options

It appears that the update service for Firefox (and possibly Thunderbird) is broken, as I get a pop-up stating "Firefox can't update to the latest version" every time I launch and every couple of hours.

I have uninstalled Firefox, installed with a new profile (moved original elsewhere), and tried it all over again after removing Firefox, ThunderBird and the Mozilla Update Service through Revo Uninstall. Doesn't appear to work.

Somehow the update service just can't fetch update information and keeps showing that message.

Any advice is appreciated.

It appears that the update service for Firefox (and possibly Thunderbird) is broken, as I get a pop-up stating "Firefox can't update to the latest version" every time I launch and every couple of hours. I have uninstalled Firefox, installed with a new profile (moved original elsewhere), and tried it all over again after removing Firefox, ThunderBird and the Mozilla Update Service through Revo Uninstall. Doesn't appear to work. Somehow the update service just can't fetch update information and keeps showing that message. Any advice is appreciated.

All Replies (13)

more options

Start Firefox in Safe Mode {web link}

A small dialog should appear. Click Start In Safe Mode (not Refresh). Is the problem still there?

more options

Try to run the Firefox program once as Administrator (right-click: Run as Administrator).

more options

FredMcD said

Start Firefox in Safe Mode {web link} A small dialog should appear. Click Start In Safe Mode (not Refresh). Is the problem still there?

I've opened Firefox in Safe Mode in the morning and left it open. I came back after work and the message still appeared.

cor-el said

Try to run the Firefox program once as Administrator (right-click: Run as Administrator).

This is already running under the local administrator account.

more options

There is a difference between using a Windows administrator account and running a program as administrator, so you can still try this.

more options

As suggested, I launched firefox.exe via the "run as administrator" and left it open overnight. It is still prompting me to download a fresh copy.

more options

Let’s do a full clean re-install;

Download Firefox For All languages And Systems {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.

http://encyclopedia2.thefreedictionary.com/Linux+Safe+Mode This shows how to Start all Computers in Safe Mode; Free Online Encyclopedia

more options

I wonder if this About:Config URL was deleted it might repopulate a 'working' URL:

app.update.url = https://aus5.mozilla.org/update/...


~Pj

more options

FredMcD said

Let’s do a full clean re-install; Download Firefox For All languages And Systems {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. http://encyclopedia2.thefreedictionary.com/Linux+Safe+Mode This shows how to Start all Computers in Safe Mode; Free Online Encyclopedia

I've completed the clean installation of Firefox (64-bit) for Windows as described above, deleting the Firefox and Mozilla Update Sevice folders while keeping the profile folder. After a few hours the message has re-appeared again.


Pj said

I wonder if this About:Config URL was deleted it might repopulate a 'working' URL: app.update.url = https://aus5.mozilla.org/update/... ~Pj

The string has not been deleted, why would it on a clean install?

more options

davinciko said

The string has not been deleted, why would it on a clean install?

Pj said

I wonder if this About:Config URL would be deleted it might repopulate a 'working' URL: app.update.url = https://aus5.mozilla.org/update/...

I should have worded it better. I'm saying, if you were to delete it, would that fix the problem?

A while back, when I couldn't get my FF to pop-up saying a new version is available, I deleted that URL in About:Config and it worked shortly thereafter. Maybe it was a coincidence.

<center></center>

[Image links removed by moderator. Please read Mozilla Support rules and guidelines, thanks.]

Modified by Chris Ilias

more options

I've cleared, the app.update.url string. Let's see what happens.

more options

Welp, none of this seems to be working.

more options

I've found my issue in my DNS tables rules. Seems I added aus5.mozilla.org along side an extensive list of know telemetry URLs.

more options

Clearing the update pref probably won't work because Firefox uses an API to retrieve the update data.

Boot the computer in Windows Safe mode with network support to see if that has effect in case security software is causing problems.