I’ll heartily second your recommendation of Kottke.org — it has a nice mixture of long form, short form and link blogging, doesn’t get repetitive, doesn’t ramble. I had to cull BoingBoing from my feed list because too much of their content was headline chasing and repetition, and I find Cory Doctorow’s Pluralistic blog to be relentlessly depressing sometimes.
Likewise, I like Safari, and have used it several times over the years as my primary browser. Like you, though, I’m a fan of many of the privacy-focused features of Firefox. Apple’s varying stances on browser extensions hasn’t helped matters for me. I hope that Mozilla can turn themselves around, but I’m preparing for the possibility of returning to Safari, or possibly to Vivaldi.