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nightly update installer not working

  • 2 replies
  • 1 has this problem
  • Last reply by James

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I keep getting a pop-up message telling me to install the latest version of Nightly but every time it fails. I'm also getting horrendous playback and performance issues with videos on YT.

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Let’s do a full clean re-install;

Download the current Nightly from

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)

Mac: Open the "Applications" folder.

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;

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

Do Not remove the profiles folder.

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. This shows how to Start all Computers in Safe Mode; Free Online Encyclopedia

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Make sure the Firefox folder has read/write permissions for the user for updates.

The more unstable Nightly development channel gets checkins and two updates each day. This can also mean encountering issues until finished, fixed, or reverted.

If you do not want frequent updates then perhaps the Release or Beta channel will be better. The Beta gets say nine to fourteen or more builds for a version on channel.