Won't open homepage on open, won't open web pages from the menu 'open new window', Can't open menu button

Question

Ok, since update to version 31.0, I have been having some problems.
I have tried doing everything stated in the support page about resetting, reinstalling, safe mode, restarting pc etc.
First problem, when I open Firefox no web page loads. It just says New Tab and a blank white page. If I press the home button I am taken to my homepage which is google.
Second problem, when I right click on a link and the menu pops up, if I click open in new window, a new window opens but it just says New Tab with a blank page and no URL information, just blank.
Third problem, the Open Menu button just doesn't work at all. You can click all you like, that thing is not opening.
I am really stuck as to what to do. I have only been using Firefox for about a month and t was good until these problems. If I can't resolve it, I will have to use another browser as it is really annoying.
I am using Windows 8.1 by the way and have scanned my computer thouroughly for both virus's and malware.

Answer 1

Hi zenithtwc, to test whether this is a settings issue, could you do a three-minute experiment?
'''Create a new Firefox profile'''
A new profile will have your system-installed plugins (e.g., Flash) and extensions (e.g., security suite toolbars), but no themes, other extensions, or other customizations. It also should have completely fresh settings databases and a fresh cache folder.
Exit Firefox and start up in the Profile Manager using Start > search box (or Run):
firefox.exe -P
''Don't delete anything here.'' Any time you want to switch profiles, exit Firefox and return to this dialog.
Click the Create Profile button, assign a name like Test731, and skip the option to change the folder location. Then start Firefox in the new profile you created.
Can it reach the internet?
When returning to the Profile Manager, you might be tempted to use the Delete Profile button. But... it's a bit too easy to accidentally delete your "real" profile, so I recommend resisting the temptation. If you do want to clean up later, I suggest making a backup of all your profiles first in case something were to go wrong.