Based on our record, CleanMyPC seems to be more popular. It has been mentiond 2 times since March 2021. We are tracking product recommendations and mentions on various public social media platforms and blogs. They can help you identify which product is more popular and what people think of it.
The CleanMyPC app scrubs the relevant registry when it uninstalls other apps. But your prescribed step 3 (scanning registry for "waterfox" after uninstallation & restart) did yield an escaped entry with "waterfox" in the entry (path/address), so I deleted it before restarting and installing. Source: over 2 years ago
CleanMyPC (to note that they are no longer maintaining nor updating this app). - Source: dev.to / over 2 years ago
FileZilla - FileZilla is an FTP, or file transfer protocol, client. It lets individuals transfer single files or batches to a web server. For many years, FTP was the standard for website design. Read more about FileZilla.
Avast Cleanup - Next generation tuneup and cleanup for your PC
PuTTY - Popular free terminal application. Mostly used as an SSH client.
Wise Disk Cleaner - Clean junks of Browsers, remove junk and useless files of Windows and Defragment your disk. Wise Disk Cleaner can delete these unnecessary files on your hard disk to free up disk space and make your computer run faster.
Ninite - Ninite is the easiest way to install software.
SDelete - Securely overwrite your sensitive files and cleanse your free space of previously deleted files using this DoD-compliant secure delete program.