Also I'm not sure but it would seem you have some kind of plugin that might be interfering as GMaps is very smooth on Mac Chrome and Safari.
And you might be single-clicking on the maps which brings up a gray marker to show you more detail of the nearest address to where you clicked. It's easier to just use the scroll wheel to zoom in/out.
And you can just put the address in the search bar and the first result on the results page should be the address detail plus links for directions.
Google Music kicks on my fan after a while. The only other thing I run that does that is Kerbal Space Program. One simulates space flight with nice (ok, decent) 3d graphics, the other plays f*cking music.
Works for me, and that's definitely one I've never explicitly set. According to my settings, the tab search just redirects to https://maps.google.com/maps?q=%s
One thing that is absolutely brain-dead is that (in Chrome) I can't type in maps.google.com and tab-search for my address. I can do this with Amazon.com or Netflix, but not an actual Google property? Weird.
Another thing that is just bafflingly absent is that GMaps doesn't know where my home and work are. Not just as locations, but as concepts. (Snide part of my brain wonders if the Maps team just lives at work.)
Another thing is that to make GMaps work with my Mac, I have to have a Chrome Extension to stop the map from freaking out. And then simple things like double-clicking to zoom in seems to have a non-predictable behavior where sometimes it zooms in and sometimes it tries to put a marker on the map.
Not everything in Gmaps is horrible. There are many nice features. But they've allowed the critical path through the software to become obscured and eroded.