Problem loading page firefox

Variety  of solution are available for this problem . There are :

First Solutions for  Problem loading page firefox :  Re install the Firefox.

Second Solutions for  Problem loading page firefox : Restart the PC (Personal computer) or Laptop.

I face this problem and i'm  pick second solutions. It's working.  I want better solutions !!!
Do you have any better solutions ?

I try to find out possible cause, I find that,

Security software (firewall ) that blocks or restricts Firefox without informing you (the user  of  firefox browser) about that, possibly after detecting changes (Update) to the firefox  program.

I’m find it on support.mozilla.org and it’s provided by richarddad. 

Everyone gives thanks to Richarddad.

He also gives a solutions and it's the Third and best solutions and it is,

Remove all rules for Firefox from the permissions list in the firewall and let your firewall ask again for permission to get full unrestricted access to internet for Firefox.

-- Cheers.