Been using LibreWolf for a week or so since someone mentioned it in a comment elsewhere - UX-wise, it's pretty much identical to Firefox. I'm happy it doesn't have Pocket and the rest of Mozilla's recent product launches arguing for space in my life. My Firefox setup was already pretty solidly "paranoid/misanthropic", so I haven't really noticed any new issues from Libre, but you may.
Overall, it's a pretty good implementation of "Firefox By Mozilla-the-Foundation not Mozilla-the-Corporation." I've been using Firefox at least in part because I think a mono- or even duo-polistic internet is a Bad thing, but Mozilla's been indifferent-bordering-on-hostile to me as a user class, so I appreciate LibreWolf as a kind of "Chromium for Firefox."
Overall, it's a pretty good implementation of "Firefox By Mozilla-the-Foundation not Mozilla-the-Corporation." I've been using Firefox at least in part because I think a mono- or even duo-polistic internet is a Bad thing, but Mozilla's been indifferent-bordering-on-hostile to me as a user class, so I appreciate LibreWolf as a kind of "Chromium for Firefox."