Is this in any way related to a.m.o. requiring add-ons to be signed? I recently tried with version 21 of Debian Iceweasel, and installing add-ons worked there.
2016-02-23 2:44 GMT+02:00 David Hedlund <pub...@beloved.name>: > In fresh IceCat 38.6.0 profile, when I open > https://addons.mozilla.org/en-US/firefox/addon/ublock-origin/, I get a > "Download" button (not the typical "Add to Firefox" button). When I click on > "Download" I get this message: > > "The add-on downloaded from addons.mozilla.org could not be installed > because it appears to be corrupt." > > > -- > http://gnuzilla.gnu.org -- http://gnuzilla.gnu.org