Urban! I spent some time with Palemoon and i have to say, i agree with you: I'll abbandon iceweasel/firefox in favour of Palemoon. It's well done, i passed through the privacy relevant settings in about:config and i saw nearly all of the relevant settings were already done (in favour of privacy protection). Moreover, there is a palemoon (pre-Australis) compatible fork of https-everywhere and NoScript works out of the box. Using the password exporter tool nearly all settings can be transported (for the rest, i did in the "brutal" way: I throw in into the palemoon default profile the entire content of the iceweasel default folder - and it works. Some extensions lament about not being compatbile but that's it. Bookmarks etc. now are there ;) ). And there is also a mobile versions which syncs well with desktop browser.
So, i'd say it is responsible to propose PaleMoon as default browser for JWM.