You can use one of these to start Firefox in Safe Mode:

On Windows, hold down the Shift key while starting Firefox with a double-click on the Firefox desktop shortcut

Or............................... .....................................

At the top of the Firefox window, click the Firefox button, go over to the Help menu and select Restart with Add-ons Disabled.... Firefox will start up with the Firefox Safe Mode dialog.

Clicking the Start in Safe Mode button will temporarily disable your extensions and themes, turn off hardware acceleration and reset toolbar and button customizations. When you leave Safe Mode and start Firefox up normally.

https://support.mozilla.org/kb/Safe+Mode

Also you Profile folder shows the presence of user.js file. but User.js file “does not exist by default. if you haven't created it yourself in the first place or aren't sure what has created it, then the user.js file shouldn't be there at all. you can go ahead and delete the file - it won't affect your stored bookmarks or other personal data...

see this article: How to fix preferences that won't save

Thank You for your reply, what I forgot to say was that this just started this week I have not added nor updated in programs for the last three weeks, until monday it all was fine. and i run the best anti v program out there.

Did you even TRY safe mode, you do have lots of addons there and they automatically update in the background.

Adblock Plus 2.4.1 ({d10d0bf8-f5b5-c8b4-a8b2-2b9879e08c5d})

BitDefender Antiphishing Toolbar 8.0 (FFToolbar@bitdefender.com) Default Theme Engine - Personas Interactive 1.6.3.11 (btpersonas@brandthunder.com) Download Manager Tweak 1.0.2 ({F8A55C97-3DB6-4961-A81D-0DE0080E53CB}) DownloadHelper 4.9.21 ({b9db16a4-6edc-47ec-a1f4-b86292ed211d}) Flagfox 4.2.17 ({1018e4d6-728f-4b20-ad56-37578a4de76b}) Flash and Video Download 1.48 ({bee6eb20-01e0-ebd1-da83-080329fb9a3a}) Flash Video Downloader 5.3.2 (artur.dubovoy@gmail.com) Garmin Communicator 4.1.0 ({195A3098-0BD5-4e90-AE22-BA1C540AFD1E}) Hide Tab Bar With One Tab 1.2beta3 ({e5bbc237-c99b-4ced-a061-0be27703295f}) Memory Fox 7.4 ({E173B749-DB5B-4fd2-BA0E-94ECEA0CA55B}) Padlock 0.5.0 ({d09e32df-8610-4b33-b929-1e631b764130}) RealDownloader 1.3.3 ({DF153AFF-6948-45d7-AC98-4FC4AF8A08E2}) Troubleshooter 1.1a (troubleshooter@mozilla.org) Video WithOut Flash 1.3.1 (vwof@drev.com) WOT 20131118 ({a0d7ccb3-214d-498b-b4aa-0e8fda9a7bf7}) Yontoo 1.20.02 (plugin@yontoo.com) YouTube Flash to HTML5 3.0 (garg_sms@yahoo.in)

Your AV must of had been so perfect it didn't even care to detect Yontoo which is considered as adware/spyware.

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 IDs of the submitted crash reports on the about:crashes page.

• You can open the about:crashes page via the location bar, like you open a website, or open the crash reports page via "Help > Troubleshooting Information".

See:

• http://kb.mozillazine.org/Mozilla_Crash_Reporter
• https://support.mozilla.org/kb/Mozilla+Crash+Reporter

You can check for problems with current Flash plugin versions and try these:

• disable a possible RealPlayer Browser Record Plugin extension for Firefox and update the RealPlayer if installed
• disable protected mode in the Flash plugin (Flash 11.3+ on Windows Vista and later)
• disable hardware acceleration in the Flash plugin

• http://kb.mozillazine.org/Flash#Troubleshooting