LOL, I don't write the code, I don't even work for the company.
None of the forum moderators do.
We are users, like yourself, who over time have proved themselves knowledgeable and helpful.
Unfortunately we are short of experienced Mac users on the forum, so we do our best.
It shouldn't have cleaned/deleted your browser, or anything else, unless you set it to clean/delete them.
But just in case this is a bug (although nobody else is reporting the same) I'll flag your report for staff attention.
It will probably help if you tell us what OS version you have, and what browser and apps went missing for you.
Back to the logfiles thing:
Looking at the new documentation for v2.# there are a few things that CClenaer for Mac v1.# did that v2.# no longer does
You might want to take a look yourself at the various sections in that documentation:
https://support.piriform.com/hc/en-us/categories/4418978752525-CCleaner-for-Mac-v-2
But for now here's what has been removed between v1.# and v2.#:
On of the things that I note has been removed is "ability to clean Recent Documents, Recent Applications, and Recent Places."
It may be that it's baked into newer MacOS that you can't delete (system) files (logfiles etc.) less than 24hrs old? So there would be no setting for it.