Be productive adds a new entry to the top toolbar, which when clicked can block you from Plurk for any number of minutes. Any attempt to use it will result in a block screen until the time elapses. It also disables my Plurk notification script. The script’s a little ugly, by the way.

Force Qualifier Language forces all qualifiers to be in the same language as the rest of your profile, including those set to be something different for whatever reason (e.g. from someone who uses the Thai interface they’ll be in Thai, even if the message is not). Note that it has no effect on the pages for individual plurks, only on the timeline.

Both of these call on or alter various internal Plurk JavaScript functions (as do my other scripts). These scripts work with both GreaseKit and Greasemonkey