That's a nice idea, but I'm hesitant to use automatic installation scripts like this, even if I review them carefully. I prefer manual steps – downloading the file, placing it in the correct directory. Also, I use custom profile directories for my web browsers, so this script wouldn't apply to my setup.
do you carefully review those files you've downloaded and placed into said correct directory, or do you just double click an YOLO your way through the install? at least a bash script allows for you to read it vs a pre-compiled binary installer. either way, you are trusting code created by someone else.