For android I tend to like Safe Notes. It’s relatively simple, encrypted with either passphrase or biometrics, and stored locally, with a way to back up to a file. Just make sure you memorize/save the passphrase so you don’t lose your entries. It’s android only though, if that matters. I only use it for shorter stuff, so I’m not sure how well it works for longer entries.

I haven’t used Chameleon, but it seems to do some stuff like change the user agent that JShelter doesn’t do. I’d assume it’s more useful to get around a site designed for a specific browser or operating system.

JShelter isn’t mainly for spoofing, it’s about blocking a bunch of potentially harmful advanced javascript features, often used for tracking. Any spoofing is mostly to keep sites working with the missing javascript features.

I have it installed on one of my browsers. I wouldn’t recommend using it unless you’re willing to tweak the settings for new sites you visit, because I’ve had it break sites pretty often with the default settings.

That’s at a very different level. With dot social it’s about a quarter of the active users on the fediverse, whereas bluesky is probably something like 95% centralized in practice. It seems to keep improving, but right now it’s basically impossible to use without mostly interacting with bsky.