Windows 10 reached EOS (end of support) on October 14, 2025. If you are on Windows 10, see this article.

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
Solved Archived

Issue with latest Firefox update -- Firefox no longer starts

Art Monzingo

After Firefox updated today, the executable no longer starts. I get the following error message:

firefox.exe -- Bad Image

C:\Program Files\<mozilla firefox\gkcodecs.dll is either not designed to run on windows or it contains an error. error status 0x000000d. < p></mozilla>

And then another error message: Couldn't load XPCOM.

Please advise.

After Firefox updated today, the executable no longer starts. I get the following error message: firefox.exe -- Bad Image C:\Program Files\<Mozilla Firefox\gkcodecs.dll is either not designed to run on Windows or it contains an error. Error status 0x000000d. And then another error message: Couldn't load XPCOM. Please advise.

All Replies (2)

Where did you get Firefox from? For XPCOM, see if this helps. https://support.mozilla.org/en-US/questions/1229392 What OS? What version of Firefox?

Chosen Solution

I re-installed Firefox (didn't manually delete anything), and this has taken care of the problem.