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My About Firefox popup window says that 'Firefox is being updated by another instance." What does this mean

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I was trying to watch a Netflix show on my Windows laptop. An error popped up that says my version of Firefox does not support Netflix. I went to my About Mozilla Firefox page. It says I have version 49.0.2. Under that it says Mozilla Firefox Yahoo! Edition and under that is says yahoo - 1.30. Under that in light gray text it says "Firefox is being updated by another instance"

What does that last phrase mean?


Thank you, Terra-Leigh Baghurst

I was trying to watch a Netflix show on my Windows laptop. An error popped up that says my version of Firefox does not support Netflix. I went to my About Mozilla Firefox page. It says I have version 49.0.2. Under that it says Mozilla Firefox Yahoo! Edition and under that is says yahoo - 1.30. Under that in light gray text it says "Firefox is being updated by another instance" What does that last phrase mean? Thank you, Terra-Leigh Baghurst

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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) 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. If you downloaded and installed the binary package from the Firefox download page, simply remove the folder Firefox in your home directory.

Do Not remove the profiles folder.

Look for, and rename any Mozilla or Firefox program folders by adding .old to them. Do not rename the Mozilla Thunderbird folder if there is one.

After rebooting the computer, run a registry scanner if you have one. Then run the installer. If all goes well, remove the OLD folders when you are done.


If there is a problem, start your Computer in safe mode and try again.

Starting The Computer In Safe Mode;
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tcup22 said

"Firefox is being updated by another instance" What does that last phrase mean?

Hi   ! It means that another program,   like an antivirus program,  or an extension,   is interferring. Running   Firefox in Safe Mode   (like   FredMcD   suggests)  will probably help you find the culprit.