One of the forums I frequent does not allow me to update my profile
using Iceweasel 38.7.1, which is the version in my devuan install. It
just reloads my profile page with the unmodified data. In a virtual
Lubuntu 16.04 having Firefox 46.0 updating the profile information works
without a problem.

Another page, ekoskane.se/lista, also does not work properly in my
Devuan Iceweasel either but works in Lubuntu 16.04s Firefox 46.0. The
page is supposed to present a list of local farming and other green
initiatives available in the south of Sweden.

Both these problems also occur in Chromium 49.0.2623.108 on my Devuan
setup. If I rememeber correctly I had the same problem when I was on
Lubuntu 14.04 as well, with both Firefox and Chromium.

Apparently these pages expect some functionality that is present in
Firefox 46.0 but is not in any of the other browsers. I do not know if
it is the same functionality missing in both cases. Do any of you guys
know what functionality this is and if there is a way to make it
available in Iceweasel or Chromium on Devuan?

Hope it's not some proprietary crap!

/fuumind