I know since I've used the open source browsers, Firefox, before that Mozilla, I've had less of a problem with spyware. Firefox has a very good migration guide, so you can take all your favourites with you.
I used Mozilla mail for years and had never caught an email bound virus, it has been replaced with Thunderbird Mozilla mail. All free open source software btw.
Just recently moved all my work and email files over to Linux system for added security. Using all open source software, didn't cost me a penny, built the computer out of spare parts. Still learning, I feel like I did when I first touched Windows way back, lots of help out there though.
I feared Linux, I must admit. I laughed when I installed it, it took 15 minutes, all the drivers were loaded..ready to go, I didn't have to touch a button..just sit and watch. Quite different from Windows reload experiences! But I only recommend you try it for non gaming, working machines and probably your second machine at home. Fun learning something new.