Ask HN: How to support Firefox / Mozilla as a small business?

So I run a small web design shop in Austria and am a long time Firefox and Thunderbird user.

I would love to spend some money to help make Firefox and Thunderbird stay open, trustworthy and most importantly relevant.

Since only some donations are deductable in Austria I'm looking for a service or product to buy to put company money to good use.

I am vaguely aware of some questionable decisions / events regarding mozilla and firefox. Ideally spending money would also help nudge things into a good direction and help firefox start becoming more independent of google.

I already looked into Mozilla vpn (I don't need it), Firefox Enterprise - which is not a thing on linux and the features don't help me either.

How do you guys support mozilla and firefox?