Your comments

None of these other extensions work properly and/or update the tab when it reloads or changes.  The ones that used to work haven't worked in some time now.  It would be great if TO added dynamic tab name / document.title updates.

My use case is the same as Rupert's in that I have enough tabs open that the tab width is only wide enough to display the 1st 3 letters of the page title and they are all generally the same.  Being able to dynamically rename them according to some regex pattern would be awesome.