When downloading a virtual machine at https://dev.windows.com/en-us/microsoft-edge/tools/vms/ I'm always getting a Unknown network error from my browser, in this case chromium. But I had the same experience with iceweasel.
Pencil is a pretty nice open-source GUI prototyping tool. The only little problem for Debian user is, Pencil depends on Firefox and not on Iceweasel. If you want to bypass that problem very easy, you can download pencil as Firefox Extension. But if you want to use Pencil as native application you have to download the deb package and will see, that it depends on Firefox. Iceweasel and Firefox are the same things, but have different names.
Here is a Wikipedia articel about Mozilla Corporation software rebranded by the Debian project.You can run dpkg also with --ignore-depends=firefox, but that isn't a very good solution.
My new ZTE Open C arrived and I just wanted to share some pictures. The last 3 month I used the Alcatel One Touch Fire and it's a difference, like night and day. I have ordered it over the german ebay-shop of zte and I'm happy about my new 85€ smartphone.