Hello, I have some problems installing the webclipper app from the mozilla site (https://addons.mozilla.org/it/firefox/addon/evernote-web-clipper/). After the downloading, the installation does'nt proceed, and the install button remains gray. I can wait an hour without have the possibility to complete the installation. Does anyone have a similar problem ? I tried to install it with chrome, and with chrome works. I suppose is a problem with the Mozilla's web site. I use a ubuntu Linux as OS, but i don't guess is a problem because firefox apps are multiplatform and with chrome it works. Sorry for bad english, best regards to everyone.