The software is perfectly cromulent. You have four on-board profiles you can switch between. Using the software is easy and allows you to remap the ABXY and paddles to any other button as well as adjusting deadzones, sensitivity and rgb.
You can also remap buttons on the fly without the software at all.
Use the renaming feature in Sonarr and Radarr. It renames both folder and file.
https://trash-guides.info/Radarr/Radarr-recommended-naming-scheme/
https://trash-guides.info/Sonarr/Sonarr-recommended-naming-scheme/
Not much, it's really just preference. Short, clicky switches vs long, tactile membrane
I love my Gamesir Cyclone 2. Works with Windows, Linux, Android (I use it for Moonlight on my NVIDIA Shield) and iOS (likely Apple TV as well). Well constructed and replaced my Xbox One controller I was previously using. Would highly recommend.
proprietary
https://proton.me/blog/pass-open-source-security-audit
offline
https://proton.me/support/pass-offline-access
I'm not sure about iOS but offline mode works fine on Android by default and desktop once enabled.
You can choose to add username and/or email. You can store both in the one entry. When you would add a username, it would be added to that context window.
Dispensible
Why don't you open up the extension and have a look? Most likely ad domains and analytics.
A torrent client on someone else's computer. You'll find them called seedboxes but they are also called application hosts.