Firefox worked yesterday morning but not in the afternoon. G-mail also does not work now.
Firefox screen now different including a caution sign and e-mail address www.Personalinteractive.com at the top. Indicates I am on an old version but when I try to update it indicates my operating system is not adequate. We have an apple laptop running OS X 10.5.8. Also g-mail will not open. Does not accept password.
Last but not least, can you think of any software you installed between the last time you started Firefox (things working normally) and this time? That software might be the problem and might need to be removed in order to avoid having your Firefox settings changed again.