This is the tool: Distill Web Monitorhttps://www.waze.com/forum/viewtopic.php?t=186410
You can set it to watch part of a page, so what I do is first get the URL at the top to be the permalink with the segment I want to watch selected, then I tell it to watch the "Last updated by: date+username" field, and anytime someone touches it I get notified.
In case someone splits or deletes the segment, the ID in the permalink would no longer be valid, but you can enable the add-on now to tell you when it checked but that there is an error. This way you know the ID you were watching was changed or deleted.
It can check at any frequency you want (minutes, hours, days, weeks, months), so you can easily make it not so often that it would slow down your computer too much.