Start Firefox in Safe Mode {web Link} by holding down the <Shift (Mac Options) > key, and then starting Firefox. Is the problem still there?

Version 33.1.1 does go into safe mode but version 34.0.5 does not. No response.

Start your Computer in safe mode. Then start Firefox 34.0.5

Starting The Computer In Safe Mode;
Free Online Encyclopedia

If 34 starts up; Type about:support in the address bar and press Enter. Under the main banner, press the button; Copy Text To Clipboard.. Then in the reply box at the bottom of this page, do a right click in the box and select Paste. This will show us your system details. No Personal Information Is Collected.

Are there any crash reports?

In the address bar, type about:crashes<enter>. Note: If any reports do not have BP in front of the numbers, click it and select Submit.

Using your mouse, mark the most resent 7 - 10 crash reports, and copy them. Now go to the reply box below and paste them in.

If you can't get Firefox to open, you will have to do this the hard way. Open the file browser / explorer on your computer. Enter this;

%APPDATA%\Mozilla\Firefox\Crash Reports\submitted

Copy the last 5-7 Recent File Names in the folder, including the date and time created. Post all the information in the reply box below.

Some problems occurs when your Internet security program was set to trust the previous version of Firefox, but no longer recognizes your updated version as trusted. Now how to fix the problem: To allow Firefox to connect to the Internet again;

• Make sure your Internet security software is up-to-date (i.e. you are running the latest version).
• Remove Firefox from your program's list of trusted or recognized programs. For detailed instructions, see

Configure firewalls so that Firefox can access the Internet. {web link}

FredMcD said

Start your Computer in safe mode. Then start Firefox 34.0.5 Starting The Computer In Safe Mode;
Free Online Encyclopedia If 34 starts up; Type about:support in the address bar and press Enter. Under the main banner, press the button; Copy Text To Clipboard.. Then in the reply box at the bottom of this page, do a right click in the box and select Paste. This will show us your system details. No Personal Information Is Collected.

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Are there any crash reports?

In the address bar, type about:crashes<enter>. Note: If any reports do not have BP in front of the numbers, click it and select Submit.

Using your mouse, mark the most resent 7 - 10 crash reports, and copy them. Now go to the reply box below and paste them in.

If you can't get Firefox to open, you will have to do this the hard way. Open the file browser / explorer on your computer. Enter this;

%APPDATA%\Mozilla\Firefox\Crash Reports\submitted

Copy the last 5-7 Recent File Names in the folder, including the date and time created. Post all the information in the reply box below.

The problem had something to do with Norton Antivirus program. My Antivirus program was up for renewal and I thought I would change to Vipre. In doing so , the new version of Firefox works. Some how the ANtivirus did not allow the program to start?

It should not. When the subscription expires, the program stops working. All that should happen is you keep getting a warning to re-subscribe. If you want, you can contact their support and ask about it. Have you remove that program?

FredMcD said

It should not. When the subscription expires, the program stops working. All that should happen is you keep getting a warning to re-subscribe. If you want, you can contact their support and ask about it. Have you remove that program?

The program was not completely expired before I changed it. I had 1 day left. Didn't want to be without.