I thought I was the only one with an issue with Firefox57. Got a Macbook Pro 16 GB, 3.1 Ghz Core i7, MacOSX Sierra (10.12.6). The CPU goes wild during a search on Google Maps and also on certain pages of forbes.com. On forbes I've disabled the Ublock origin coz they politely asked me to.

At one point the whole browser crashed. So right now got Chrome and FF open and am switching depending on the site. Might just end up back in Chrome if this isn't resolved.

And what are some of the core competencies given that there is sooooo much to learn when you are a one man shop?