You might want to look into the Brave browser (https://brave.com), which is a commercial browser based on the Chromium code, funded by a micropayments idea, which tries to generally be more privacy-sensitive than the Google version.
As for a fully open-source version: here's a fairly recent summary (2017) of what's in Chrome and not in Chromium (the open-sourced subset):
There are other omissions that could get in the way of general usability; chromium also omits some proprietary licensed codecs, including the mp3 support.
However, Google synch support, etc, is left in -- and if you desire to keep that out, maintaining the patch set that does it without cooperation from upstream could be a hassle. Whenever they refactor of update the integration between synch and the rest of the browser, you need to make corresponding changes in the patch set that cuts all that out -- and at a fairly rapid pace, too, lest you find yourself unable to ship an urgent security update.
So, it's doable -- but at a price in usability, and doing it right requires some kind of continual effort. Which is what Brave is, in effect, trying to arrange with their payments-based funding scheme. And even a very capable person trying to do the project solo, on a volunteer basis, would be putting themselves at risk of burnout.
Does one really want to associate themselves with Brendan Eich though? Brave is what he has been building after being ejected from Mozilla.
While Brendan has built some interesting and useful things including Javascript, he is apparently poisonous enough to cause three of Mozilla's board members to resign, including a founding executive of Yahoo, the former CEO of AVG, and the former CEO of Mozilla Corp (from 2008 to 2010).
The disagreements were about strategy and mobile experience, so not enough to call someone poisonous. Place Yahoo, AVG, and Moz Corp against Brendan's co-founder status and JavaScript.
The other toxic drama was about a 1000$ political donation. Very sad to see an unpopular view used to paint someone as a monster. If democratic political views are enough to kill someones career, it is more a sign of the toxicity of today's social media and activism than a character judgment.
> Does one really want to associate themselves with Brendan Eich though?
No, not really. Not a good political idea to align yourself with the black sheep. With all the tars and feathers he just looks weird.
Though it also works in his favor: Brave is popular amongst the alt-right and technical-minded early adopters. They see it more as character assassination and SJW corporate culture taking desperate vengeance for Trump's win.
As for a fully open-source version: here's a fairly recent summary (2017) of what's in Chrome and not in Chromium (the open-sourced subset):
https://www.howtogeek.com/202825/what%E2%80%99s-the-differen...
There are other omissions that could get in the way of general usability; chromium also omits some proprietary licensed codecs, including the mp3 support.
However, Google synch support, etc, is left in -- and if you desire to keep that out, maintaining the patch set that does it without cooperation from upstream could be a hassle. Whenever they refactor of update the integration between synch and the rest of the browser, you need to make corresponding changes in the patch set that cuts all that out -- and at a fairly rapid pace, too, lest you find yourself unable to ship an urgent security update.
So, it's doable -- but at a price in usability, and doing it right requires some kind of continual effort. Which is what Brave is, in effect, trying to arrange with their payments-based funding scheme. And even a very capable person trying to do the project solo, on a volunteer basis, would be putting themselves at risk of burnout.