content: Open source doesn't mean that it doesn't contain google hooks.  All it means is that the source code is available to see.  Ungoogled is based on Chromium, which is the open source upon which Chrome Browser is built, and the open source Chromium contains google hooks. Ungoogled strips those hooks out.  Vivaldi is also Chromium based, and I just don't know to what extent they have stripped the Google hooks, but Vivaldi is extensively different than the vanilla Chromium, but I'm not expert enough to look at the Vivaldi source code to look at whether or not they've done what Ungoogled has done.