Ah okay, I see that I made an assumption of how memmy would behave based on the issue wefwef had to address the other day. I feel like this setting could possibly be worded a little better then because it certainly sounds as though all images would be their full height (and zoomed to fit the width of the user's screen) with it enabled.
Say, for example, somebody (not naming names) posts an image of beans whose aspect ratio is 10x taller than that of your screen's... This setting makes it so that you have to scroll forever to get past it because it won't resize its height to fit your screen's height.
Not trying to pile on advice that's not helpful in your current situation, but I would really recommend getting an air pump to keep in your vehicle at all times for precisely this situation. Mine has saved my ass several times just over the last few years. And that's also weird about your locking lug nuts—when I had a vehicle that had those, it came with the socket adapter included in the standard roadside kit.
You can run headless or do what the person I was responding to recommended and put it behind an authenticated portal, but that's not really going to stop other instances and clients from accessing the same resources that op is hoping to limit access to except in the most basic case of people casually browsing op's Lemmy instance through op's own lemmy-ui.
Edit, but to be clear, what I was responding to and my response didn't directly address op's specific concern (which I kind of misunderstood myself before just now rereading) that outside/guest users shouldn't be able to search for communities from other instances and I think it's a fair concern because just searching for a community from another instance brings in posts and could be a vector for spam/abuse.
Wouldn't this do basically nothing to prevent a 3rd party client from browsing your instance without authentication? I don't know that there's much that can really be done about this because you need open APIs for other instances to be able to access the content of your instance in order to make federation possible. That said, it's an important consideration that anybody running a single person instance should consider. If you run a single person instance, people can learn a lot about you just by seeing which communities are available on your instance. The only way to obfuscate your actual interests is to have a dummy account subscribe to all the top communities on the biggest instances. (Which, honestly, this isn't a bad strategy to employ anyway if you're wanting a fresh All feed).
If you're having issues with one of your accounts in Liftoff! you might need to remove your account and log back in. On the add account page you can long press an existing account to remove it and log back in. But if your instance's website isn't logging you in reliably either, there may be something else going on or you might need to clear cookies for your Lemmy instance's website as well.
There was a security vulnerability exploited on multiple instances last night and a lot of instance admins invalidated all existing login tokens. I don't know if there's a Lemmy API response for invalid sessions, but if so, it appears we're not handling it in Liftoff. Regardless, I expect there to be changes to the Lemmy API relatively soon to address some shortcomings in the way login sessions are handled. When that happens, we'll try to handle invalidated sessions in a nicer way (i.e. with a banner saying you've been logged out potentially).
They did answer your question. Based off what they told you, one can reasonably assume Sync for Lemmy will be to Lemmy as Sync for Reddit was to Reddit...
Sonarr and radarr manage downloads for TV and movies in a nice way for Usenet and actually torrents as well. You can set up quality profiles and choose which shows and movies you want to download and they will grab torrents/nzbs that meet your preferences, automatically start them in your torrent app or Usenet downloader, and then organize them in folders with appropriate metadata for Kodi/Plex when the downloads complete. They automate the process very nicely.
Edit, I'm a Usenet guy if that wasn't already clear lol
Ah okay, I see that I made an assumption of how memmy would behave based on the issue wefwef had to address the other day. I feel like this setting could possibly be worded a little better then because it certainly sounds as though all images would be their full height (and zoomed to fit the width of the user's screen) with it enabled.