Mozilla Firefox won't open

Ways to help you solve the problem of Mozilla Firefox not opening

Mozilla Firefox is an indispensable tool for you to surf the web in the faster, more secure, and fully customizable way. Of course, you won't expect to come across this problem that Mozilla Firefox won't open. But if this problem happens, what should you do?

Mozilla Firefox won't open.

There are all kinds of problems that cause Mozilla Firefox not open. In the following, the article will give you different soluations to your problems.

1. Firefox will not start after installing or updating McAfee SiteAdvisor.

Firefox may fail to open after:

• installing or updating the McAfee SiteAdvisor Firefox extension, or
• updating McAfee software that includes the SiteAdvisor component

According to MacAfee, the problem is caused by a conflict between SiteAdvisor and automatic proxy configuration scripts in Firefox. To fix this problem, you must start Firefox in Safe mode and uninstall the SiteAdvisor extension.

2. Firefox is attacked by virus.

As to this problem, you should start antivirus program to scan Mozilla Firefox.

3. There is something on PCs targeting a specific named process and shutting Mozilla Firefox down.

If Firefox previously worked but suddenly doesn't start, it may be due to some corrupt data in your settings. Uninstalling and reinstalling Firefox would not fix this problem because your settings are not removed on uninstall. To test to see if this is the problem, use the Profile Manager to create a new profile. If the problem goes away, you can then move your bookmarks and other important settings into the new profile.

4. Firefox won't launch if started from another Application.

If you have more than one Firefox profile and usually get prompted to pick a profile when starting Firefox, clicking on internet links in other programs will not start Firefox if you are not using the latest version. As a workaround, Check mark the "Don't ask at Startup" option in the Profile Manager and switch Profiles by opening "firefox.exe -ProfileManager". (Fixed in Firefox 3.0.2 and above.) Solution: Update Firefox to the latest version.