Could you check your download history for the source of the problem file?

Sometimes bad upgrade links are generated by an extension. You can review, disable, and often remove extensions on the Add-ons page. Use either:

• Ctrl+Shift+a
• "3-bar" menu button (or Tools menu) > Add-ons

In the left column click Extensions. I suggest disabling anything unrecognized, or which you do not remember installing, or which you do not plan to use for the next 48 hours.

Firefox will provide a link to restart if that is needed in order to make your changes effective.

Any difference?

If you like, you can get a full installer for Firefox 30 from this site:

https://www.mozilla.org/firefox/all/ (scroll down to your language)

Passing comment

You also apparently have have mindspark installed and that is often considered potentially unwanted or even malware.

See also

• Remove a toolbar that has taken over your Firefox search or home page
• Troubleshoot Firefox issues caused by malware

Firefox 30.0 has been the current version on mozilla.org since it was released last week on June 10.

I've checked the history but don't see anything out of the ordinary. I have downloaded version 30, so I'll see if that works. Thanks!

Ok. Thanks! I'll check that out.

I downloaded that, but I'm still getting the update message.

Hi cdhenson, is the update message a popup that appears from time to time or on certain websites?

Did you get a chance to review your extensions?

You may also want to try some of the malware scanners/cleaners listed in our support article: Troubleshoot Firefox issues caused by malware.

Can you attach a screenshot?

• http://en.wikipedia.org/wiki/Screenshot
• https://support.mozilla.org/kb/how-do-i-create-screenshot-my-problem

Use a compressed image type like PNG or JPG to save the screenshot.

See also:

• http://kb.mozillazine.org/Updates_reported_when_running_newest_version

Why would you think that? I've never heard of "mindspark".

LOIF, this thread was started by somebody else as the "mindspark" was mentioned the "More system details" by the OP.

I see you have a similar question at https://support.mozilla.org/en-US/questions/1019645

Hi LOIF, are you the same person as cdhenson?

The reference to Mindspark is in the "More System Details" associated with the original post (in the right sidebar).