Sounds like it'll be useful for stopping things like "McAfee" from automatically installing their crap into Firefox without asking.
https://www.microsoft.com/en-us/software-download/windows10s...
Some crazy software companies then used a dark pattern - clicking 'I don't agree,' meant you agreed to install unwanted crap.
Adobe flash, Java runtime, utorrent and any installer from cnet.com are examples. That's why I installed Unchecky to protect me from bundleware and automatically uncheck, skip 'offerings' when installing new software.
Edit: As mentioned below, the Chrome team used bundleware extensively in its early days.