trying to reinstall the firefox..

where did you got an installer?? did you got from friends, better you download the installer from the the official website, maybe the installer has been broke, try to download from the official website and try to install it again..

Good Luck =D

downloaded from official website.. it was working fine until last week and all of a sudden it was crashing. I reinstalled twice with same issue.

We're sorry to hear that your Firefox seems to be crashing when you open it. Please perform the following steps to give us a crash report ID that helps us find out more about the cause of the crash.

1. On the keyboard, press [Windows] The image "Windows key" does not exist. + [R]. This should bring up a Run window that contains a text field.
2. In that text field, type %APPDATA% and press Enter. An explorer window should open.
3. From that explorer window, double-click on the Mozilla folder, then double-click on Firefox and then on Crash reports. Double-click on submitted.
4. Now, you should see a list of files that contain reports. Go to View > Arrange Icons by > Modified to get the most recent files at the top of the window.
5. Open the most recent 5 files with a text editor and copy the IDs.
6. Paste each ID with bp- into the reply window on the forums.

Thanks in advance!

You can find more information and troubleshooting steps in the Troubleshoot Firefox crashes (closing or quitting unexpectedly) article.

bp-d50fcb69-10f7-4f98-bb9d-6804e2160224 bp-6058377a-e0ca-4f90-b301-0da242160224 bp-5073ce8d-ba64-4447-8ac5-0d40f2160222 bp-3a1eb64d-c984-4a9c-88b3-ccbc52160222 bp-021b901b-4188-4570-ac50-5cad42160222

unfortunately this crash may be caused by websense endpoint security software that is running on a device. in case your computer is part of a managed enterprise environment, please get in contact with your it department about this issue. more information is available in bug 1181091.

in a larger enterprise using the extended support release (esr) version of firefox, which receives security updates but feature updates only once every 10 months, might also be a better option compatibility-wise: https://www.mozilla.org/en-US/firefox/organizations/faq/