Hello
szkola-zao, and thank you for sharing your cleanly balanced configuration.
If you choose to keep IObit's ASC 8 & Glary Utilities, do not run any functions which alter or 'clean' registy settings. I also agree with Rmg152's, frogboy's, & Umbra's, recommendations:
An addblocker is one of the core extensions for both security & privacy. As I've come to understand, uBlock & uBlock Origin are nearly identical with "Origin" helmed by the original developer & uBlock comprising his former team with each entity sharing good will all around. I use both, respectively, on different systems, but you can make your choice of either from here:
CCleaner is among my favorite free programs, it is safe enough to use after every browsing session, and is both efficient in clearing away accumulated "junk" files and preserves your privacy by removing tracking cookies too!
If you'd prefer using their portable version (extracted onto an external flash drive) find it near the bottom of the downloads page under "Builds".
A program that adds an additional layer of protection (specifically while browsing) is Sandboxie. This virtual sandbox, originally developed to address vulnerabilities in IE (hence it's name, Sandbox-ie) it's compatible with Firefox. Think of a sandbox as being a waterproof barrier similar to an effective rain coat. Any changes including cookies which attach to your system (like water) are kept only temporarily, and your browser, insulated from harm, can return to it's original state upon the sandbox's deletion which removes all. This is also why any update patches or changes you wish to remain must be performed outside of the sandbox.
Find further descriptions, reviews, and the free download here:
http://www.sandboxie.com/index.php?DownloadSandboxie
Privazer is more involved than CCleaner, and also very effective, which is another reason I've saved it (as I recommend you to adopt it in this order...) last.
Edit: I'd nearly forgotten to mention an important off topic fact.
We used to have a kitty just like the wonderful feline you've displayed as your avatar, & her name was Itty-Bitty-Kitty!