But why... You already have lots of web browsers, just do some research.
https://en.wikipedia.org/wiki/List_of_web_browsers
Also, it's almost impossible to build both new rendering and javascript engines from sratch with all the features already available on Blink and V8. Even tho they were both developed by Google, they're fully open-source and extremely efficient, that's why Opera, Vivaldi and even Brave decided to use those engines.
That being said, why would you build a browser using these engines, as there are already lots of browsers... Plus, you'd need mobile versions in order to sync the favorites on all your devices.
Me, personally, I like to stay as google-less as possible, and for that same reason I use Firefox (with SpiderMonkey and Gecko engines).
Btw there are firefox versions (since firefox is fully-open-source) focused on user privacy (WaterFox).

I took my vote back as I believe ProtonMail should focus on making a secure email service for everyone as it has a lot to improve. Personally its more important that its designed in a way that users don't get stuck in its ecosystem.

There is no need for another privacy friendly browser, because there are already some... I think PM should for now primarily focus on email related features.
I think using different providers for completely different services is a good thing, because it removes the single point of failure.

I would gladly pay extra for this feature.
Paying $30 per month, is a steal for all the services you provide me with.

Just use Tor or DuckDuckGo browser, or Firefox with adding...

@ Christopher Dalton Very simply Chris your question is "48 shades of grey" what exactly do you want?? one hand you want google/chrome interface but you dont like there tracking ( that is how they are designed to track every click and page) BUT If you want security use TOR (the onion ring) Go the whole hog and set up a VPN and a half decent firewall on an old 486 box or lappy.. itzUp2U You can have your cake and eat it too, if you graze on both sides of the fence robbo

there are a lot of safe browsing projects,
IMHO protonmail should focus all energy to provide the best email service.

People who upvoted this topic dont realize that its not a solution:

While browsers could be improved to resist fingerprinting, there is no point in creating a new one. If you want to improve privacy on the web, effort should be applied to secure data transfer standards or decentralized file systems (e.g. Tor, i2p, GNUnet, Matrix, Zeronet, IPFS, et cetera.)

http://secushare.org

The greatest security & privacy risk on the internet today is NOT the browser — its the lack of a global standard protocol for secure mail transfer which encrypts all metadata and supports forward secrecy. Any available resources should be directed at solving this problem first. If you want to improve browsing security, just use Firefox with Ublock, Umatrix (for power users), Ghostery, Canvas Defender, cookie autodelete, and VPN.

TOR ..hmmm
https://surveillancevalley.com/blog/fact-checking-the-tor-projects-government-ties

Get passport,id card,driving license,visas,permit etc.[globalimmigrationathomy@gmail.com]

Downvote. Waste of protonmails time. Use Firefox with ublock or noscript.

Just use Firefox with ublock origin this would be a waste of time and there's more things to focus on.

Secure Browser would be great!!! Protecting against all threats and vulnerabilities such as Java flaws and WebRTC leaking true IP address behind protection such as vpn.

Browser
1) https:// force all pages to use (minimal) or advise you that page doest have ssl etc
2) to work in conjunction with proton vpn if required
3) Browser sand box for testing purposes of dogy links that may be launching malicious code to steal peoples details and money etc
4) virus protection built in and firewall? nice to have
5) recommendation app that will check and validate the link based on other sources (nice to have)

Its seems these days so shocking that we have to go to these lengths of protecting our data from data theft and other entities when this is our world and our global network. But thanks to the good guys such as proton and others lets hope that they will never get brought out with the promise of money by super power.

Thats just basic list that maybe will help everybody in some way.

Where

Don't be fooled, no where is really "safe", except that outside the US it is safer than in the US.

Chrome does not keylog your logins. It’s also by far the most secure browser since each tab runs with very few system privileges.
But you can use Firefox, if you like.

While I do understand the viewpoint (and somewhat lean towards that viewpoint myself) of the commenters who say that creating a "Proton Browser" is basically trying to reinvent another "privacy wheel", it will be ultimately Protonmail's decision. I believe it is beneficial to have a variety of ideas recorded for later use no matter if people say they are "good" or "bad"; nonetheless, a "Proton Browser" is something that should be avoided for a long while as the developers of ProtonMail have so many other features and optimizations they need to make for this email service before they would ever consider expanding to other territories. One thing to note is that plenty of people have switched to other services, software, etc. to not become completely dependent on using Google for everything (there's a lot of risk when being reliant and giving information away to a single company through the use of its popular software). Maybe it is best to not rely on one company to give all of the software you use, no matter what their intentions are. Do we really need ProtonMail to become another Google? I don't mean they would have malicious intentions and start making unethical decisions; but even if they became "The Ethical Google," it's unlikely that most of the people using ProtonMail will use all of their other services. It would probably be better for ProtonMail to just be an email service. By focusing on being a great email service, they won't need to make so many sacrifices to make up for other services. The same goes for other companies making different kinds of software. When a company puts all of its efforts into making a single type (and occasionally a few types that go along together is okay as well) of software with a special focus, one can expect that this piece of software will appeal to a certain market. The company can focus their efforts to appeal to that market; and if all goes well, a great piece of software for specific purposes is created and enjoyed. For ProtonMail, there could be other things they could expand to, like have a cloud storage as it would easily tie in with the email service (the cloud service would store email files as Google Drive stores Gmail files). Overall, a "Proton Browser" would probably be better left with some other company to make, but it doesn't mean that ProtonMail won't surprise us one day and give us a Proton Browser that nobody expected could exist. If they were to do this, I would suggest for the browser to have a specific purpose without ending up becoming another Google Chrome or FireFox attached with a "We Love Privacy and Security!" slogan. Perhaps a browser that focuses on encryption, simplicity, and speed (maybe a different kind of Lynx (but not as clone, of course)).

I noticed that you said that you didn't like how Google "snapshots and keylogs our protonmail logins." Maybe instead of a browser, why not a standalone application for ProtonMail? I don't mean having a Bridge, but an actual application solely for its own service. Another suggestion is to make an alternative to Thunderbird with a special focus on Protonmail's internal encryption (perhaps it would work better with the internal encryption and become much faster, more reliable, more optimized, and cleaner without the need for a lot fo addons that end up making Thunderbird cluttered and buggy). Mozilla has lost some respect from some its users, and ProtonMail users have suggested that the developers should be careful with creating a Bridge as they would rather sacrifice having IMAP, POP3, etc. support than to sacrifice security and privacy. Maybe this would be a better long-term solution.

What to clone browsers, most use Google Chrome and do not want to hear anything else. You can create anything, but it will be to anyone, this is a question

Что клонировать браузеры, большинство пользуется гугл хром и не хотят слышать больше ни о чем.Создать можно что угодно, но будет это кому надо, это вопрос

There already many alternatives browsers out there. Brave is probably the best one so far and is only getting better with the new features.

Also if Proton Browser becomes a thing it may cost money to use which I don't blame ProtonMail for charging users to use it browser but don't expect this to be free.

And a huge debate over it is what engine the browser will use, Firefox engine, Chromium engine or make its own. And to make your own engine for a web browser is a lot of work and needs to always be tweaked since it will need to be up to date with all the newest HTML, CSS & JavaScript code.

If Protonmail would go for a browser it needs the following to buy me:

- Run on Linux/Docker
- NoScript option
- Plugin dev options
- OSS

I would also gladly let them mine crypto on the browser as a way to pay back while running