I don't see a Services item in the menu, so that could be Mac only, or maybe Enterprise edition. But breaking out into a browser misses the point of the References->Research->Search feature.
Smart lookup provided a list of results from web search, current document, and local searchable files, in a side panel - and the means to paste an item into the current document.
There's a couple of free Addins that might do for now, I'll give them a spin when I get a chance.
My guess is that they're going to wrap it in CoPilot… which I'm finding quite useful, although it didn't know about this issue… maybe I'll tell it
And CoPilot is not intrusive, as some have suggested. I pinned it to my taskbar and it just sits there until I start it, like everything else.
BR