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.

Date/Time: 2014-12-30 18:10:21 -0800 OS Version: 10.10.1 (Build 14B25) Architecture: x86_64 Report Version: 21

Command: Firefox Path: /Volumes/*/Firefox.app/Contents/MacOS/firefox Version: 34.0.5 (3414.11.26) Parent: launchd [1] PID: 1846

Event: hang Duration: 3.00s (process was unresponsive for 36 seconds before sampling) Steps: 31 (100ms sampling interval)

Hardware model: Macmini3,1 Active cpus: 2

Fan speed: 2307 rpm

Timeline format: stacks are sorted chronologically Use -i and -heavy to re-report with count sorting

Heaviest stack for the main thread of the target process:

 30  ??? (<840EF4A1-42C1-3626-807A-E7056F6C20FE> + 1138119) [0x100615dc7]
 30  __psynch_mutexwait + 10 (libsystem_kernel.dylib + 90466) [0x7fff8dae6162]
*30  psynch_mtxcontinue + 0 (pthread + 22095) [0xffffff7f8109b64f]

Process: firefox (Firefox) [1846] Path: /Volumes/*/Firefox.app/Contents/MacOS/firefox Architecture: x86_64 Parent: launchd [1] UID: 501 Task size: 47136 pages (+58) CPU Time: 2.658s Note: Suspended for 1 sample Note: Terminated (zombie) for 1 sample Note: Unresponsive for 36 seconds before sampling Note: 2 idle work queue threads omitted

Sorry, this was the only report I could find.

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

If you can get in, look again for crash reports as instructed above.

Also;

Type about:addons<Enter> in the address bar to open your Add-ons Manager. Hot key; <Control>(Mac:<Command>)<Shift> A)

In the Add-ons Manager, on the left, select Extensions. Disable a few add-ons, then Restart Firefox.

Some added toolbar and anti-virus add-ons are known to cause Firefox issues. Disable All of them.

If the problem continues, disable some more (restarting FF). Continue until the problem is gone. After, you know what group is causing the issue. Re-enable the last group ONE AT A TIME (restarting FF) until the problem returns.

Once you think you found the problem, disable that and re-enable all the others, then restart again. Let us know who the suspect is detective.

I thank you for your suggestions, however, this did not fix the problem. I have reset to default and started in safe mode. Both result in the same problem, Firefox opens to the us.search.yahoo.com site and then stops responding and I have to force quit FF. I can't get to the extensions to turn them off or on. Thanks, Wood

Start Firefox in Safe Mode. Now follow these instructions to change your page settings. Once the problem is resolved, you can always change them back.

Type about:config<Enter> in the address bar. If a warning screen comes up, press the Be Careful button. This is where Firefox finds information it needs to run. At the top of the screen is a search bar. Type Yahoo

For each entry, double click and select Modify Change all the settings to; about:blank (a blank page),

Once you are done, restart Firefox normally.

See:

• http://kb.mozillazine.org/Mozilla_Crash_Reporter#Location_of_crash_reports
• http://kb.mozillazine.org/Mozilla_Crash_Reporter#Viewing_crash_reports

• https://developer.mozilla.org/How_to_get_a_stacktrace_for_a_bug_report

If you have submitted crash reports then please post the IDs of one or more recent crash reports that have a "bp-" prefix:

• bp-xxxxxxxx-xxxx-xxxx-xxxx-xxxxxxxxxxxx

You can find the Report ID of recent crash reports on the "Help > Troubleshooting Information" page (about:support).

• Click the "All Crash Reports" button on this page to open the about:crashes page and see all crash reports.

Thanks for the help. I would not have found that hidden data on my own. Unfortunately, there are no recorded crash reports made to Firefox. There is only one record of a Force Quit report made to Apple even though I have made about 2 dozen. Here it is

bplist00—??]ForceQuitDate3A∫T\#êÇø?

Start Firefox in Safe Mode. Now follow these instructions to change your page settings. Once the problem is resolved, you can always change them back.

Type about:config<Enter> in the address bar. If a warning screen comes up, press the Be Careful button. This is where Firefox finds information it needs to run. At the top of the screen is a search bar. Type google

For each entry, double click and select Modify Change all the settings to; about:blank (a blank page),

Once you are done, restart Firefox normally.

bablushaw23 Just wanted to know, why did you copy my prior post?

https://support.mozilla.org/en-US/questions/1038980#answer-671325

OK... so I have another external hard drive with Yosemite on it. I started up from that hard drive and downloaded Firefox. I worked just fine. So I re-installed Yosemite on my original internal hard drive and tried loading Firefox again and back to the same problem.

Alrighty den... I downloaded AppTrap from downloads.com. I was then able to delete all of the associated Firefox files hidden on my computer with this program. Once done, I was easily able to reinstall Firefox and import my settings from Safari. I am back in the groove. Thank you all for helping me narrow down the problem.