I did some research on Firefox's Site because I had the exact same problem, the reason why it isn't loading is because you have Firefox running in the background but you don't see it.
To End Problem:
Other than Internet Explorer
Make sure you have the latest version of JRE installed. If not, visit: http://java.com/en/download/ If this still doesn't seem to work for you, try running the website using Mozilla Firefox. Mozilla Firefox can be downloaded for free from here: www.mozilla.com
Anti-hacking
Because of the way Internet Explorer is closely integrated with Windows, it is easier for writers of malicious software to attack Windows through IE than through other browsers. Therefore, if you use a different browser such as Firefox by Mozilla, you might evade attacks targeting IE.
Most of the malicious plug-ins are mostly programmed for Internet Exploror. Firefox Mozilla programers are constantly working on security holes before they are exploited. It's faster, safer, and Active-X is disable so that hackers can't get into files that easy.
The states the reason for an e-mail message.
I'd ask WHY you want to delete it, but that isn't my business ;) If you're using windows, and Mozilla Firefox, go to Tools>Clear Private Data, or alternativly, you could just press Ctrl+Shift+Del. When a pop-up comes up, check "Cookies". Then press ok. Your browsing history should be cleared.
Mozilla Firefox SoccerHead67: I personally think that Maxthon is the best browser. You can customize the background, add pictures of yourself, make a Maxthon account AND there is a Maxthon for mobiles. However, Google Chrome is a close second because you can customize the background and it is easy to monitor the downloads. But, Firefox has a lot of glitches, for some reason, some computers cannot download Flash for it. Internet Explorer JUST got tabs, and you can't really customize anything. Link to Download Maxthon: http://www.maxthon.com/
if your having the same problem i had then what i did was change my search engine thingy, like if you use internet explorer, then swith to mozilla firefox. but the reason it happened to me was becuz a guy hacked my account, then got it so it was about to get banned then, when i logged on i got banned. well, hopefully the same thing dosnt happen too you. and btw it might just be a glitch.
The reason that search history may not be working well on Firefox 10.1 could be because that particular version is outdated. A way to fix this would be to update Firefox, or use a different browser.
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This problem happens for a variety of reasons but the main reason or cause that this happens to me is because of a new add-on. Try to uninstall any recent add ons and see if that helps. Otherwise I have had to remove all instances of firefox from my computer and then restart and download a new "clean" version of Firefox. Try starting FireFox in Safe Mode (found in the start menu)