I don't mind spending on good tools, but I won't buy a highly locked down device at any cost. An open source OS is a must, any new device will have to compete with my current phone that also has an SD card, headphone jack and is easy enough to open so that I can change the battery myself. Folding phones are inferior in all those aspects.
If you enter a matrix user name on your profile, Lemmy adds an extra button on your profile to "Send Secure Message". Example: https://monero.town/u/shortwavesurfer
I don't know if this behavior is default, or if you have to configure something for it, but I think it's a nice way to bridge forum-like communities with chatrooms (matrix itself can be bridged with irc, discord, telegram).
Librewolf on desktop, Mull (and Fennec) on android. If some important site is broken, I have some chromium based backups without any modifications, which I wipe every now and then.
For Librewolf there are a few interesting privacy addons, most importantly Font Fingerprint Defender. It scrambles the list of installed fonts on the system, so if websites analyze those in order to track you, they will detect you as a new unique user every time you visit their sites.
Hey, I found our canvas neighbors in the wild! Hi there :)