They make a large amount from Google paying them to be the default search engine. Also they have been making additional projects that can be subscribed to as add-ons for Firefox (like a VPN and an email forwarding service that allows you to make fake email addresses or phone numbers to use on sites that will forward the messages to your real inbox/phone). You can use a limited version of the email thing without paying though so it is easy to try out. And they are always ready to take donations of any size and can be reoccurring. I personally pay .99/month for the email service even though I don't use it often. As it is nice to have if I need it, and it is basically a donation at that point. lol.
But even just making a point to donate some one-offs here and there does help in small ways to keep a real option in browsers that isn't just another Chromium-based project. https://donate.mozilla.org/en-US/
Everyone hated when IE was the only browser that sites were coded for, and we are seeing more and more Chromium only sites. Which means a bad vulnerability in Chromium will impact all the browsers based on it. Also privacy add-ons for Firefox tend to work better and block ads well.
I've never thought about it, how do they make money? I've never seen an ad or sent them money.
They make a large amount from Google paying them to be the default search engine. Also they have been making additional projects that can be subscribed to as add-ons for Firefox (like a VPN and an email forwarding service that allows you to make fake email addresses or phone numbers to use on sites that will forward the messages to your real inbox/phone). You can use a limited version of the email thing without paying though so it is easy to try out. And they are always ready to take donations of any size and can be reoccurring. I personally pay .99/month for the email service even though I don't use it often. As it is nice to have if I need it, and it is basically a donation at that point. lol.
Here are links to those products if you care to read more about them or at least see pricing.
https://www.mozilla.org/en-US/products/vpn/
https://relay.firefox.com/
But even just making a point to donate some one-offs here and there does help in small ways to keep a real option in browsers that isn't just another Chromium-based project.
https://donate.mozilla.org/en-US/
Everyone hated when IE was the only browser that sites were coded for, and we are seeing more and more Chromium only sites. Which means a bad vulnerability in Chromium will impact all the browsers based on it. Also privacy add-ons for Firefox tend to work better and block ads well.
I donate every. single. month.