For an alias that is a one-letter shortcut, we use a naming convention for the file: the letter, an equal sign, and the result. For example, the file g=git.zsh is the alias that sets g to run git.
For an alias that is intended to launch a program, we use a convention of trying probable locations for the tool. For example, for the alias firefox, we look in order in /opt (e.g. typical for our custom installs), then on the path, then in the typical macOS location.
Program Environment Variable Conventions:
$EDITOR: Set the default Editor for editing text files (i.e. vim, nano, vi, code, etc.)
$PAGER: Set the default Pager to display text files (i.e. more, less, etc.)
$BROWSER: Set the default Web Browser
($SEARCHER, $CLIPPER, $DATER, $JUMPER are other optional program environment variables).