Haha. I can see how someone would think I'm trolling, but I assure you I'm not. It's a pretty deeply-ingrained behavior that I perform quite often, so yes, it does make a difference. FF57 is still not so much better than Chrome (to me, anyways) that it's worth dealing with re-learning this for me.
I don't know, if you develop and are used to being able to click a word or field of text, having to go through and highlight the word is more time consuming and potentially a flow breaker especially when you're talking about variables in some languages.