Sure enough, thanks for that.
My suggestions for the context menu & save functions still apply.
Just to clarify my meaning (because I now see that you've deleted my post in the request section).
Currently, the setting in question is global in scope ONLY.
The changes I propose to the context menu would make it so that a user has the option to narrow the scope to effect the active tab ONLY. I suppose you could turn the global setting into a default with my change overriding it if desired.
The option to save RE settings for certain URLs and enable them automatically when that URL is visited in a later browser session is actually a separate thing altogether.