Sometimes, the font size on a web site is too small, for example at https://www.retsinformation.dk/ where the font-size is 11.2 pixel. You can override the text size locally, via the userContent.css file.
Also, highlighting links can be useful, to allow tabbing between them.
Electrum is a light weight Bitcoin wallet. There are many advantages of using a Desktop wallet, as opposed to keeping your digital currency on an exchange, where you have less control. Another, and possibly safer solution, would be using a hardware wallet.
If your Ubuntu installation sometimes drops into a black screen showing something like /dev/sda1: clean, 227147/30269440 files, 3330843/121068288 blocks, try to get get back to your installation by pressing Alt+F2.
Pyrenamer doesn't exist for Ubuntu 18.04, but GPRename is a similar GUI batch renamer app from the default Ubuntu repositories. To quickly open a program in Ubuntu, you can press the Super (Windows) key and start typing, but GPRename isn't added after installing it:
Snap is a new experiment in Ubuntu 18.04, which makes the File System useless, as well as other annoyances like creating a folder in /home/username/Snap.
To uninstall Snap and reinstall the packages the normal way: