...or at least a cleaned up Firefox fork.

Might also be nice if they take inspiration from the arc browser

There is a browser for every need in the market right now. I don't think proton can come up with something unheard of

This seems like a waste of resources, similar to ProtonPass. We already have browers that work perfect. I would rather Proton spend time making what they have already implemented better.

I agree with some other people from the comments.

This would be a very bad use of resources at Proton. Developing a browser from scratch takes enormous efforts and an extended period of time.

Instead, a browser add-on, build on already existing Open source projects (like uBlock Origin) might do the trick. Maybe something allowing for a Librewolf like experience (in terms of privacy and security tweaks) on Firefox or Chrome based browsers as an add-on.
But honestly, it can likely already be archived through existing extensions.

I quite disagree. Two ways of doing it: creating a new web browser from scratch, or taking one of them and adding a Proton layout. The first one is too time consumming regarding other priorities, even if I agree that it's a shame that Chromium is everwhere, and that Firefox is the only "mainstream" alternative. The second, I don't see what I would gain that a simple extension couldn't provide.

A Proton browser would be very useful,
but it would take time and resources.

It would definitely be possible,
but it would take time until Proton presents a browser.

A browser would take around 3-5 years if Proton were to develop one,
because the browser needs a lot of security features and at the same time has to be fast.

But let's wait and see.

I do not support this idea. I think the Tor Browser and Mullvad Browser do a great job already. A browser would add more work to a whole different thing than the main products. Rather than breath, Proton should focus on the depth of its products.
There still are countless "basic" features in Mail, Drive, and Calendar that could be implemented, and I think it makes more sense to put resources into them rather than making and maintaining a web browser and/or a search engine.

Mullvad Browser really did a great job already. I'd love you see team up with The Tor Project & Mullvad however to make it even better.

I would greatly appreciate a proton browser! Plus it would help spread the word about proton.

Most other web browsers allow vulnerabilities and target us with ads.
Firefox used to be pretty good, but the quality and performance lately has declined. We need something better. True boolean search would be a great addition, including search within results.

Like someone else has already stated, it would be absolutely great to add our own Proton Browser to the Proton environment (please, withhold judgment until you've read the last paragraph). It feels like the one thing that is missing (however, I do wish Proton would make a Virtual Card service for online payments as well.) I am making a separate post to share my thoughts more clearly and to be notified about any feedback.

- Search Engine
Proton is more than capable of creating its own privacy-focused search engine. That being said, when it comes to online searches, I like to get as many results as I can, that's why I use SearXNG on hardened Firefox which combines the results of multiple search engines. It would be great to have something like that. However, it would also make sense to have something unique to proton, akin to what Brave was trying to do. The only difference being that Brave relies on Chromium - something I would NOT enjoy for Proton's browser.

- Extensions
Needles to say, the browser should support extensions for the other Proton apps, notably Pass and VPN.

- Price
To make this more appealing, there could either be a free version of this with heavy limitations, or make it an exclusive feature for Plus / Unlimited users. I can see that there could even be a new plan just for the browser, like there are for Pass, Mail, VPN.

- Safety
It would be nice, though not essential, to have some sort of integrated antivirus / antitracker with Proton Sentinel. Perhaps another extension? The idea is that when downloading a harmful file, or trying to reach a dangerous site, Proton Sentinel (or anything akin to that) will warn you and try to prevent you from doing that.

- Quality over quantity
This can potentially draw too many resources from the company and its workers. While having a dedicated browser sounds very appealing to some - and to me - there is the harsh reality that such a project could distract Proton from managing and improving the already existing apps. That is not something the userbase would appreciate. A Proton-made version of Firefox sounds good, too, but it might be redundant with the absurdly vast amount of other options there are currently. In my case, Librewolf for PC and Mull for Android. Would Proton's browser be able to compete? I can only see it possible if it actually ended up not being free, or maybe it would simply be just not a smart business move.

Edited

What is the most important and most used application in the world today?

Answer: The Browser.

Respectfully, Proton has great ideas and applications, but lacks cohesion and a clear identity. And, because each Proton app has its own environment, it makes it very difficult for the average user to adopt the entire suite of apps.

Solution:

Protonmail (misnomer) might consider a simple identity, Proton+.

In this scenario, Proton+ is in essence a browser; a browser surrounded with Proton's superb security stack.

This browser comes with 5 native apps ("plugins"): VPN, Mail, Calendar, Contacts, and Messenger. Each of these apps can be used independently as a stand-alone app or an app tightly integrated with the other apps inside the secure envelop of Proton+.

Proton+, as described above, is a perfect, complete, and secure package for today's world; and a package that does not exist yet (to my knowledge).

Best regards,

Max

I have customers that use Citrix Secure Browser, now that could be and interesting challenge to have something with feature parity

Proton Browser > Proton VPN > Customer On-Premise

Apoyo el navegador, eso sí, no quiero que se parezca al inútil Chrome, sino más a Firefox y brave, qué tenga complementos y sea igual de versátil qué Kiwi browser!!!!

Proton's own and superb browser. Yes!
Proton Navigator? ;)
You're the best. Go for it.

I would substantially rather them rally behind Firefox.

Don't build your own browser. Negotiate a deal with Mozilla foundation (and/or the other independent browsers) for a settings option that redirects account storage, password manager, etc. to Proton. Not a plugin and not a fork, but built-in and supported at Mozilla, so security updates happen asap. For this they deserve some support, and I'll be happy to see some of my visionary dues go there.

A Proton browser that has a nice design and is easy to use, that would be very great, if you develop a browser then you really have a complete all-in-one service, thank you!