I was in Paris as well last weekend, life went on as usual for most people. Indeed, for most of the day, I didn't realise how badly things were panning out except on TV. I knew stuff would happen but didn't cancel the trip (via TGV).

Only time I knew something was up was when add'l métro stations were no longer served as the protests spread. And the Gare St-Lazare smelled a bit burnt. Late in the evening when things calmed down, I witnessed some of the damage near the jardin des tuilieres and Opéra district- really despicable and sad.

But overall, no worries. I wouldn't worry about security as long as you use some common sense and a sense of awareness. I was also impacted back on the 17 Nov when I was in Strasbourg but I just got to know all the little back roads around the blockades