-> Uninstall your current Firefox

• http://kb.mozillazine.org/Uninstalling_firefox
• DO NOT SELECT TO REMOVE USER DATA AND SETTINGS
• Restart your system

-> Download latest Firefox version from one of these links using some other Web Browser:

• http://www.mozilla.com/en-US/firefox/new/
• http://www.mozilla.com/en-US/firefox/central/
• http://www.mozilla.com/en-US/firefox/fx/
• http://www.mozilla.com/en-US/firefox/all.html

-> Installing Firefox on Mac

• https://support.mozilla.com/en-US/kb/Installing%20Firefox%20on%20Mac
• http://kb.mozillazine.org/Installing_Firefox#Mac_OS_X

Check and tell if its working.

Your Bookmarks, Passwords and other data are stored in your Firefox Profiles - Where Firefox stores your bookmarks, passwords and other user data folder which is placed in another location so you don't need to worry about them.

Update Firefox to 7.0.1

• Update Firefox to the latest release

Check and tell if its working.

Thank you for helping me with this situation, mha007, I appreciate it.

I have uninstalled Firefox 7.0, then installed the latest version 7.0.1. My first time opening the browser it crashed again.

Let me know if the latest crash log would be helpful, or anything else you might need. Thanks.

FF 7.0.1 has crashed 'bout 3 times after install (within 1 minute). How can it be that the last stable version was FF 3.x.x ? (IIRC the last stable was 3.6.16, and after that every version has been more or less unstable and I've had to revert back)

I was still using it a little while ago without any issues, only the last update to it made it somewhat unstable... Something has gone terribly wrong with these last versions.

Immediately after startup FF starts to "eat up" memory, a few seconds after starting memory usage is over 1,2 G and climbing up to 1,5 G and processor usage is 50% (from dual core, so I'd summize that one of the cores is at 100%)

When memory usage exceeds 1,5 G, then FF crashes

@jcholewa

Create a New Profile as a test to check if your current profile is causing the problems.

-> Basic Troubleshooting: Make a New Profile

• https://support.mozilla.com/en-US/kb/Basic%20Troubleshooting#w_8-make-a-new-profile

IF that New Profile works then you can recover your Bookmarks and Passwords from the Old Profile.

-> Recover important data from an old profile

@Miggis

-> Troubleshoot Firefox crashes (closing or quitting unexpectedly)

Check and tell if its working.

Opened console. Attempted to navigate to the following location, as per instructions:

/Applications/Firefox.app/Contents/MacOS/firefox-bin -ProfileManager

Console returns the following message:

"dyld: unknown required load command 0x80000022

Trace/BPT trap"

A window also pops up stating that firefox-bin quit unexpectedly, but other programs were not effected.

-> Is my Firefox problem a result of MALWARE ??

• Popups Not Blocked - http://kb.mozillazine.org/Popups_not_blocked

-> Do a MALWARE check with these Malware Scanning programs. You need to scan with all programs because each program detects different malware. Make sure that you UPDATE each program to get the latest version of their Databases before doing a Scan. Also, Close All other Applications (softwares) before Starting to Run Scans.

• Malwarebytes' Anti-Malware - http://www.malwarebytes.org/mbam.php
• SuperAntispyware - http://www.superantispyware.com/
• Windows Defender Home Page - http://www.microsoft.com/windows/products/winfamily/defender/default.mspx
• Spybot Search & Destroy - http://www.safer-networking.org/en/index.html
• Ad-Aware Free Internet Security - http://www.lavasoft.com/products/ad_aware_free.php

Check and tell if its working.

Can't run any of them because they are executable files/Windows Vista or 7 compatible only. Is there a way for me to process a .exe in OS X, or a program that is compatible with my platform you recommend to use instead?

There are also specialized forums for Malware Removal such as those listed below, where you might be able to get more help:

• Bleeping Computer Forums - http://www.bleepingcomputer.com/forums/
• Spyware Warrior Forums - http://www.spywarewarrior.com/index.php
• SWI Forums - http://www.spywareinfoforum.com/
• AumHa Forums - http://forum.aumha.org/
• SpywareInfo Forums - http://www.spywareinfoforum.com/

Check and tell if its working.

Well thanks for all the help, mha007. It appears, at this point, that the issue has been resolved.

As found at the Bleeping Computer Forums, I downloaded the latest free home edition of Sophos Anti-Virus software. It did detect a few malware threats, which I quarantined. As stated, it is a free program that I would recommend to any Mac users as it does not take up many resources, and it should be a satisfactory protection for any at home use.

After a restart of my computer I was able to get Firefox up and running. It seemed to be hogging a lot of RAM initially and was slow to get running, but now I've been using Firefox problem free for the past 3-4 hours.

Anybody with the same issues I had, definitely run through the steps above and certainly try a malware scan/system reboot to hopefully clear out any issues.