Your activities & candid interplay while adopting changes to improve your system's configuration have been delightful!
I'd recognized you've 3 different browsers, so the number of extensions used for all of them are truly less than it appears.
I like how you've chosen to use a local account, and +1 for choosing CCleaner!
Personally, I recommend setting Firefox to "Never remember history".
Consider below, if you have not done the following for your Chrome & Opera browsers yet:
- Go under settings >>> privacy >> and then check the box beside "Block third party cookies".
Finally, a free (shareware) program that is an effective software to sandbox your browsers is called Sandboxie which I am using now. Originally developed to protect (in a virtual sandbox environment)
Internet
Explorer, you can read and download it from softpedia.com here:
..or directly from the developers (Invincea) here:
All in all, I like your set up a lot.
Thank you for sharing your configuration, and allowing us to share with you!