hello, could you provide your latest few submitted crash reports? please enter about:crashes into the location bar, copy the latest few report ids from there & paste them here into a forum reply. this will give us a better understanding what may be triggering those crashes.

bp-fe4e6b20-e872-4dc4-82cb-7b3062140215 15.2.2014 12:09 
bp-d0cec30b-a090-4ac8-a115-1b3fa2140214 14.2.2014 17:44 
ded771b3-907b-4678-8ee0-826b53d614ad 14.2.2014 17:42 
bp-9b366217-6038-4478-a26d-b607f2140214 14.2.2014 12:55 
8fe01ffa-08a1-45ae-8406-9d09f885c414 14.2.2014 12:54 
4141aee8-17ff-45a3-845b-af1024b67a9c 14.2.2014 12:54 
bp-296a0a78-7530-4419-b2e8-dd9d02140214 14.2.2014 12:52 
bp-f3cadf59-0da9-473f-a78b-60f792140214 14.2.2014 12:49 
bp-0dabb75d-c008-4cf8-8a8b-a38e72140214 14.2.2014 12:48 
bp-0bf62dc9-f530-4c40-a437-aa91a2140214 14.2.2014 12:47 
bp-4d9a135e-f56d-4681-bb5b-79de32140214

Did you check for issues caused by other (possibly security) software on the computer if it happens with other browsers as well?

Boot the computer in Windows Safe Mode with network support (press F8 on the boot screen) as a test to see if that helps.

Try Firefox Safe Mode to see if the problem goes away. Safe Mode is a troubleshooting mode, which disables most add-ons.

(If you're not using it, switch to the Default theme.)

• You can open Firefox 4.0+ in Safe Mode by holding the Shift key when you open the Firefox desktop or Start menu shortcut.
• Or open the Help menu and click on the Restart with Add-ons Disabled... menu item while Firefox is running.

Once you get the pop-up, just select "'Start in Safe Mode"

If the issue is not present in Firefox Safe Mode, your problem is probably caused by an extension, and you need to figure out which one. Please follow the Troubleshoot extensions, themes and hardware acceleration issues to solve common Firefox problems article for that.

To exit the Firefox Safe Mode, just close Firefox and wait a few seconds before opening Firefox for normal use again.

Please report back soon.

hello, due to the wide range of error signatures, i would speculate that your hardware might be involved in the issue. can you test the integrity of your RAM with a tool like www.memtest.org?

Reinstalling system solved the problem. Firefox began to crash while i start getting blue screen errors, now it just works fine. Solved.

Firefox da best browser !