This site will have limited functionality while we undergo maintenance to improve your experience. If an article doesn't solve your issue and you want to ask a question, we have our support community waiting to help you at @FirefoxSupport on Twitter and/r/firefox on Reddit.

Avatar for Username

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.

Rohkem teavet

Teema arhiveeriti. Please ask a new question if you need help.

Can't uninstall or install firefox

  • 1 vastus
  • 4 on selline probleem
  • 6 views
  • Viimati vastas FredMcD

gcotterl
gcotterl
more options

When I double-click the Mozilla Firefox icon on my desktop, a pop-up appears saying "Couldn't load XPCOM"

When I click the START button click on CONTROL PANEL click on PROGRAMS (uninstall a program) select Mozilla Firefox 43.0.1 (x86-en-US) and click on UNINSTALL nothing happens.

Downloading Firefox from your website is unsuccessful.

Opening the HELPER.EXT (in C:\Program Files (x86)\Mozilla Firefox\uninstall) doesn't work either.

When I double-click the Mozilla Firefox icon on my desktop, a pop-up appears saying "Couldn't load XPCOM" When I click the START button click on CONTROL PANEL click on PROGRAMS (uninstall a program) select Mozilla Firefox 43.0.1 (x86-en-US) and click on UNINSTALL nothing happens. Downloading Firefox from your website is unsuccessful. Opening the HELPER.EXT (in C:\Program Files (x86)\Mozilla Firefox\uninstall) doesn't work either.

All Replies (1)

FredMcD
FredMcD
more options

Download Firefox For All languages And Systems {web link} Save the file. Then;

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.


Look for, and rename any Mozilla or Firefox folders by adding .old to them.

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

If the system has trouble doing this, Start your Computer in safe mode with networking. Then do the above.

Starting The Computer In Safe Mode;
Free Online Encyclopedia