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.

Learn More

This thread was archived. Please ask a new question if you need help.

Couldn't load xpcom

  • 1 reply
  • 1 has this problem
  • 3 views
  • Last reply by guigs

Mindent
Mindent
more options

Hy Guys, FF sends me a message: Couldn't load xpcom.

unist and reinst do not help.

i have bougth the DDL files Fixer, to fix xpcom-ot, doesn't work. and the DDL files Fixer team does not answer.

Other bugs too: for example now I've lost the prallax effekt which worked before. (see the effect here: www.lajtner.com/lm/parallax.html), that I cannot see now. Do you kno what to do? Best, T Please answer in English, Magyar or Deutsch.

Hy Guys, FF sends me a message: Couldn't load xpcom. unist and reinst do not help. i have bougth the DDL files Fixer, to fix xpcom-ot, doesn't work. and the DDL files Fixer team does not answer. Other bugs too: for example now I've lost the prallax effekt which worked before. (see the effect here: www.lajtner.com/lm/parallax.html), that I cannot see now. Do you kno what to do? Best, T Please answer in English, Magyar or Deutsch.

All Replies (1)

guigs
guigs
more options

It could most likely be your firewall. Please make sure these are ok: nss3.dll & xul.dll & Firefox.exe xpcom.dll is also a key part to run Firefox.

Try CCleaner and completely reinstall.

Certain Firefox problems can be solved by performing a Clean reinstall. This means you remove Firefox program files and then reinstall Firefox. Please follow these steps:

Note: You might want to print these steps or view them in another browser.

  1. Download the latest Desktop version of Firefox from http://www.mozilla.org and save the setup file to your computer.
  2. After the download finishes, close all Firefox windows (click Exit from the Firefox or File menu).
  3. Delete the Firefox installation folder, which is located in one of these locations, by default:
    • Windows:
      • C:\Program Files\Mozilla Firefox
      • C:\Program Files (x86)\Mozilla Firefox
    • Mac: Delete Firefox from the Applications folder.
    • Linux: If you installed Firefox with the distro-based package manager, you should use the same way to uninstall it - see Firefox telepítése Linuxra. If you downloaded and installed the binary package from the Firefox download page, simply remove the folder firefox in your home directory.
  4. Now, go ahead and reinstall Firefox:
    1. Double-click the downloaded installation file and go through the steps of the installation wizard.
    2. Once the wizard is finished, choose to directly open Firefox after clicking the Finish button.

More information about reinstalling Firefox can be found here.

WARNING: Do not run Firefox's uninstaller or use a third party remover as part of this process, because that could permanently delete your Firefox data, including but not limited to, extensions, cache, cookies, bookmarks, personal settings and saved passwords. These cannot be recovered unless they have been backed up to an external device!

Please report back to see if this helped you!

Thank you.