When a link to a webpage is clicked on in the launcher in linux, the program freezes and can only be closed with a force quit.
Issue reproduced on Ubuntu 15.04 and Xubuntu 14.04.
Some web services and downloads are currently unavailable due to internal restructuring. In the meantime you can probably find what you're looking for in our Discord chat server. For more information, check the newsfeed or ask in Discord.