For Windows and Mac Chromium builds without Google Sync I recommend: https://chromium.woolyss.com/ From the site: "Welcome on this auto-updated website to easily download latest stable version or good build of Chromium web browser. All is free and open-source."

Don't download the default installer. Instead scroll to the build that says "No Sync".

Chromium of course is the Google sponsored open source project that Chrome is based on. It has the dev tools of Chrome which I prefer to those of Firefox.