Is there any free software that does a similar job to Adobe after effects out there for a mac?

I've posted this previously but no one can seem to help me. I have been using Firefox for a couple of years now and all of a sudden it is saving my login id's. I don;t want this. I unchecked "save passwords' in the tools section because it someone told me to try that, but it is not saving passwords it is saving login id's . I have malwarebytes and avast and scan each night. Is this something new that Firefox is doing or what? I would just like to disable it because I don't want other users of this computer seeing my login id's. Please help me someone!

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