Believe it. Firefox is kind of unbeaten in this regard.

There was a study carried out on what kinds of data leaks on browsers during launch [0] but Chromium specifically wasn't measured. I can only infer Safe browsing to be a leak point available on Chromium since it is shipped by default but I have it turned off (never needed it anyway) so I have not observed any pings related to it personally.

[0] https://www.scss.tcd.ie/Doug.Leith/pubs/browser_privacy.pdf

SafeBrowsing V2 only sends a partial hash to Google, only sending the full hash if the partial has a match. You can just read Chromium's whitepaper on their various features if you want to understand the privacy implications.

Here you go: https://twitter.com/jonathansampson/status/11658588961766604...

> What I found were dozens of requests, which loaded nearly 16 MB in data. Lets break down what I saw.

> I also reviewed Google Chrome, for those interested: When I launched Google Chrome for the first time (and let it sit for a minute), 32 requests were made, and 7.26 MB of data downloaded.

Presumably Chromium would ping even less than Google Chrome.

Raw numbers mean nothing. Lots of these requests are totally benign.