I switched to
Ungoogled-Chromium about 3 yrs ago, and liked it better than Google Chrome. It felt like a cleaner user experience.
If you want to install any extensions, though, note you'll probably want to add the
"Chromium Web Store" extension. This enables Ungoogled Chromium to install extensions from the Chrome Web Store just like you do with regular Google Chrome.
However, as much as I've liked it, it's now my second choice. I switched to Supermium about 6 mos ago, and am liking that better than either Ungoogled Chromium or regular Chrome.
Also, it's significant to note that Supermium is the only Chromium fork still maintaining compatibility with Win 7. In contrast to other Chromium forks available for Win7, Supermium appears to be based on Chrome 122 (as of this writing). Ungoogled-Chromium ceased Win7 support after Chrome 103. Google Chrome itself stopped at 109, Vivaldi stopped at 108, and Brave and Opera both dropped Win7 after Chrome 109. All current versions of those other browsers now require Win 8.1 or Win 10 (and seem poised to drop 8.1 any moment now).
Using Supermium on Win7, I also checked what User-Agent String the browser is sending websites. It’s telling websites you're running Chrome 122 on Windows 10, even though I was using Win7. That should help avoid some of the nags from websites that want to complain if they see you’re using Win7/8.x. It won’t stop them all, but it will fool the sites that merely check the User-Agent String.
There are portable versions of both
Ungoogled Chromium and
Supermium, so why don't you try them and see which suits you better? They are no-install versions, so you can put them in a temporary folder, test them out, and simply discard the folder later if you don't want it.