TBB 7.0a3 doesn't properly show HTTPS warning
When visiting a website with a "bad" certificate the browser usually shows a warning. With TBB7.0a3 I get a basically white window with a back back and an advanced button which does not work (see screenshot). I could reproduce this with several sites (https://pads.ccc.de https://www.geonames.org etc.).
To upload designs, you'll need to enable LFS and have an admin enable hashed storage. More information