LG Update Blocker stops the "a new software version is available" popup that webOS shows on every boot, without touching the firmware itself.

Blocking the update servers alone does not do it: the updater asks LG about new firmware around 20 seconds before the Homebrew Channel gets to run its boot hooks, so on a CX the check succeeds every time and the popup is already up. Nothing running that late can win the race, so this app closes the popup as well as blocking the servers.

It applies up to five reversible layers and re-applies them on every boot through a Homebrew Channel startup hook:

• Block LG update servers - points snu/su/nsu.lge.com and their TLS and CDN aliases at 127.0.0.1 in /etc/hosts, which stops the download and every later check in the session.
• Close the update popup - closes the alert raised during boot, then stays subscribed to the notification manager and closes any later one as it opens.
• Delete staged firmware - wipes /mnt/lg/cmn_data/swupdate should the TV ever manage to download an image.
• Lock the staging folder - bind-mounts an empty read-only directory over it so nothing can be staged again.
• Turn off auto-update settings - switches off every update related key that com.webos.settingsservice exposes on your firmware, remembering the original values.

Requires root and the Homebrew Channel: the app asks the Homebrew Channel to elevate its own service on first launch. "Remove protection" undoes everything.