I have two laptops. My main laptop, a Libreboot X200, runs Slackware 14.2
with the Free eXtension Pack from FreeSlack. My second laptop is a dead
Libreboot X60s with Trisquel 7.
I do not recommend FreeSlack. A lot of packages come from the
slackbuilds.org build scripts, and weeding out proprietary dependencies is a
pain. I thought Slackware would offer a stable OS with a large community for
support, but it hasn't been as helpful as I'd hoped.
But, for large community support, FreeSlack is better than Parabola.
Slackware IRC and fora do not turn away FreeSlack users, and will help even
if they know you're on FreeSlack. Arch won't do that; they chase you out
with flaming torches if they find out your kernel says it has no blobs.