Yes. I donate to various open source projects (e.g., KDE, Sunshine, Dark Reader), the conservation fund, the ACLU, and the EFF.
As for how, I try to do it via their preferred platform on an annual basis instead of monthly (if possible) to minimize fees.
Why? I believe charity is a path towards shaping the world for the better (and I can afford to). Rule #1: take care of yourself before taking care of others.
WebKit based browsers like GNOME Web do still exist and do a reasonable job. That’s funded by Apple though so…