Why do you use firefox?

On PC:

1. Containers
2. Firefox's screenshot button. It's so good. https://i.imgur.com/9lHxekk.png
3. Wanting to not see the browser market be monopolized. Competition is good.

On Android:

1. Extensions support
2. This button: https://i.imgur.com/heuupxK.png It's so handy.

Been using it for 7-8 years and only seen it improve. A few gripes to deal with, but I'm happy otherwise.