Opera (even with VPN turned on) saving links that should be deleted by CCleaner.
C:\Users\UserNameGoesHere\AppData\Roaming\Opera Software\Opera Stable\Code Cache\js
I count 61 files saved upon using Opera browser once today.
It's been doing so for months.
You can have CCleaner automatically clean those files by inputting an Include:
https://www.ccleaner.com/docs/ccleaner/using-ccleaner/including-files-and-folders-for-cleaning
Edit:
Note that this will only work if you're using Custom Clean, located in: Options > Settings