Update uBlockOrigin to a newer version
We should try updating the uBlockOrigin xpi included in Ceno to a newer version. Currently, we include version 1.40.8 (released in Jan 2022). I'm not sure if there was a reason that we stuck with this version, it could be that this was the last one with support back to firefox 60. However, since Ceno jumped to v2, we are using the latest versions of firefox (v117+), so going back that far is not a concern. Maybe there were other concerns regarding new versions, we should look through old redmine tickets to see if we can uncover anything.
Let's test out the current release of uBlockOrigin, v1.51.0. If this seems to work okay, then we can make a habit of regularly updating uBlockOrigin (though we should check to see what happens when users upgrade to a new Ceno version that includes a newer uBlockOrigin version?).