This had me wondering if something was seriously broken with my uBlock Origin installation and/or Waterfox profile, but after the browser restart everything seemed OK with uBlock Origin and elsewhere, so I ended up mostly ignoring this. Until I had to check something in the latest uBlock Origin dev build.. and got the exact same "hang" again upon trying to install it.
Turns out this behavior is a uBlock Origin design choice - https://old.reddit.com/r/uBlockOrigin/c ... o_ubo_124/
So now I've flipped that setting, and updating uBlock Origin is back working again.https://old.reddit.com/r/uBlockOrigin/comments/dzkwyw/cannot_update_to_ubo_124/f88kxc8/ wrote:This behaviour is on purpose, if you dislike it, set extensionUpdateForceReload to true in Advanced Settings, provided you are/become an "Advanced User" first.
Just posting this as a heads-up in case it saves some confusion, I did not know extensions could intentionally defer a manual update like this and this unexpected behavior really had me concerned that my daily-use Waterfox profile had been hosed.