Vieb is a newer keyboard-driven browser that tries to modernize the best parts of Vim-style navigation. Like qutebrowser and Vimb, it allows you to handle almost everything from the keyboard, whether ...

os.path.join (folder, filename) ensures the path is correct for the system. On Windows, it uses backslashes (reports\summary.txt); on Linux and macOS it uses forward slashes (reports/summary.txt).