For filling out basic information on forms like contact information, so I won't have to keep typing the same info over and over again, what free software do you recommend?

Any tips will be appreciated.

Thanks in advance.

Foxit reader (https://www.foxitsoftware.com/products/pdf-reader/) does that well and it's free.

Many browsers have an auto fill feature, so what browser do you run?

The LastPass password manager will fill forms and let you set up any number of different data sets.

As per your PM about Firefox form fillers software,

https://addons.mozilla.org/en-US/firefox/addon/autofill-forms/

And

What Is the Best Free Form Filler for Firefox? (http://www.brighthub.com/internet/google/articles/99127.aspx)

My HP/Windows 10 set with Bing does it automatically.