You can try:

• How to fix preferences that won't save

You can also check the connection settings.

See "Firefox connection settings":

• Firefox can't load websites but other browsers can

Why do you want to edit or delete the prefs.js file? What is its role? The file in my computer directory path: / .mozilla/firefox/o5hzot2r.default If I deleted it, is not able to restore home settings?

Can you explain your problem a bit better in English to make sure that I understand correctly (I used Google translate)?

I assumed that you had a problem with setting the Home page.

如果与设置主页有问题，那么我应该怎样去设置主页？ 火狐中怎样设置主页的一些操作说明我已看过，但是没起作用。