Open Firefox in safe mode then enable one by one your add-ons untill you find the missbehaving one

Best advice is to go to a Restore Point that is before the date of any updating or installing the offending apps. Then try the re-install One Application at a time...

delete the update

hi there bondy

i had the same problem its very simple to fix when my computer installed it warned me about the security problem with the current update it will not run right turning of the pc is the last thing it said with That there is a problem with the 8.5.3 program enough security measures and i did check it said a number of things your computer is not fully up to date this can be causeing problems . or the program has a virus if it has not been downloaded through a certified sight it surgests to do a virus check then after that run a H.P pc health check and it says do not refresh as it will cause more problems as the system allready is re running the problem and your not running the latest firefox security programs i got alot running on mine

WOT sight id A.B.P add blocker pro it auto blocks anything thats un safe

fire fox fire wall 13.4 and fire FTP the main program that you will need for the new version of firefox to work and avg 8.4 new program and windows defender 9.6

if you get the program as listed the main one is FIRE FTP otherwise firefox will not run

if that does not work fire off a message to the guys that make fire fox hey i do frist run of all of firefox programs and it does not work without FIRE FTP

Also make sure that either Firefox or IE is the default browser. if neither is the default or if IE is, and your trying to load Firefox the this problem will occur.

The simplest manner to effectively use FF is disable IE.

look at the top of your screen, see ifthere is s 'small bar on top, it might be your program and you have to click it on to open it up I get that sometimes.

I get that on my other PC, but not on this, it just doesn't open

Cheers. It is opening in safe mode, and have consiquently disabled all add-ons. I will re-enable them one by one now...

Remember: Restart Firefox every time you enable an add-on to detect the troublemaker

Download pcdecrapifier and remove FF completely and anything else that needs to go like residues of the volunteer programs that sometimes include themselves in a O/S re-install.

When you reinstall the program will ask if you want FF as the default, say no. This contradicts my other post indicating disabling IE but not using IE creates a security hole.

Hi Bondy,

Not you again??????????!!!!!!!!!!!

I suggest you use Restore Point.

Are you able to make the firefox your default Browser?

Do you have a working email and what is it?

Is is practical to take windows back to its original set up?

Have you checked on how to get over the problem either on the Microsoft or Firefox

If you can link to any of these firefox help pages it could take you to the answer.

It also lists the firefox Knowledge Base, which may also help.

Get back to me/us when you have read and hopefully sorted a plan out.

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Take care

Yes me again, Im more trouble than i'm worth :D I think its ok now, the add ons are no big deal. Thanks for the info. Take care...

Hi Bondy,

I searched for "firefox will not open" on the firefox help pages and got these back. Take a look and see if anything clicks for you?

http://support.mozilla.com/tiki-newsearch.php?where=all&locale=en-US&q=firefox+will+not+open&sa=

Firefox will not start

This articles describes what to do if the Firefox window doesn't open when you open choose the Firefox icon. If Firefox starts but won't load any websites, see Error loading web sites. If you get...

Firefox is already running but is not responding

All of your personal settings, bookmarks, and other information are kept in your Firefox profile. For more information on Firefox profiles, see the Profiles article. Firefox will only use one pr...

There's lots more but I cannot paste them all.

Take care.

Try fixing your registry CCleaner or some other program.