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

Lolu chungechunge lwabekwa kunqolobane. Uyacelwa ubuze umbuzo omusha uma udinga usizo.

Firefox will not launch using Mac OS X 10.14.6

more options

When Firefox is launched, a Finder Message reads: "The application “Firefox.app” can’t be opened." After problems with Firefox (possibly related to Kaspersky Internet Security software), I finally resorted to: a) uninstalling and deleting all Kaspersky software (which had no effect), b) deleting all Firefox and Mozilla files, and c) reinstalling a new downloaded version of Firefox. Firefox still will still not launch when the Firefox icon in the Applications folder is clicked. The so-called safe-mode launch is not available when the Option key was used for launch. I can launch the new version of Firefox using a Terminal command (which also restores previous in-use windows and website pages that were in use), but no web pages will load anyway.

When Firefox is launched, a Finder Message reads: "The application “Firefox.app” can’t be opened." After problems with Firefox (possibly related to Kaspersky Internet Security software), I finally resorted to: a) uninstalling and deleting all Kaspersky software (which had no effect), b) deleting all Firefox and Mozilla files, and c) reinstalling a new downloaded version of Firefox. Firefox still will still not launch when the Firefox icon in the Applications folder is clicked. The so-called safe-mode launch is not available when the Option key was used for launch. I can launch the new version of Firefox using a Terminal command (which also restores previous in-use windows and website pages that were in use), but no web pages will load anyway.

All Replies (1)

more options

Hi georgerussel, please ignore the spam message promoting an unofficial phone number.

(Sorry, I don't know where to find more information on a Mac about why a program doesn't start normally.)