Can't get on Blogger

Hi All
I know that I haven't been on here in awhile ..well the reason is that I can't sign into blogger on my computer at home ....right now i'm just updating everyone from work which I should have done a long time ago.
I don't know why I can't log on from my computer at home. Everytime I try it won't let me ...I think it has something to do with Firefox???? I tried to fix it but it don't work:(

Have a great day all!!