I don't know anything about immutable distros, but any good VPN provide Wireguard or OpenVPN config that you can just import into your network settings/manager. Mullvad does.
You haven't seen my Firefox with Sidebery extension and almost 300 tabs open, neatly organized into categories, tab stacks with three levels and folders :P
I should clean it up some day
My favorite situation that happened few times already was when I sent a link to webpage that worked for me in firefox with no problem to someone using chrome and it told them to use chrome.
I don't know the full context, but your comment seems more like harassing. It definitely adds nothing to the debate and only creates toxic atmosphere on lemmy.
I always read from my phone, so I just grab Feeder from F-Droid and start adding feeds. It can also usually detect the feed even without explicit feed url, so you don't have to hunt the rss button on the website you wanna add. I just realized you might be talking about setting up RSS on your blog. If so, please ignore my comment.
I literally did it by accident by stopping scrolling in the exact position.