The recent batch of fixes to GNU IceCat from upstream mozilla-esr52 included a fix for armhf:
https://hg.mozilla.org/releases/mozilla-esr52/rev/bd35fa23f79a and I'm pleased to find that Hydra successfully built it: https://hydra.gnu.org/build/2083261 I don't have a display-connected armhf machine handy at the moment, but I'd be curious to hear if it actually works. Any volunteers to test it? Mark