Adapting a comment I posted in a different Firefox thread:

I'd like to use Firefox. I prefer its ideals to everything else. I've tried it out several times the last year. It's okay. Unfortunately, I always end up going back to Safari. Despite the performance improvements, Safari still feels like a faster, sleeker, smoother, and more user-focused browser.

Firefox is still pretty ugly. On macOS, it feels chunkier and less natively integrated. It does not feel like a first-class citizen of macOS, but rather like a gtk+ or Qt app ported to the Mac.

Safari's "omnibar" is superior to Firefox's. Safari actually suggests web sites (see https://imgur.com/a/dY2SWKB), which I use all the time. Wikipedia is a major one. Start typing "Richard Fey", for example, and the first hit will be the Wikipedia page for Richard Feynman, complete with a short summary and photo. Firefox forces me through a Google search. I use DuckDuckGo and its shortcuts, but Safari's suggestions are more helpful.

I also tried out Firefox on iOS some time ago, and it wasn't as nice as Safari. For there to be a point to this, I'd need the same browser in both places, with perfect syncing of bookmarks, cookies, tabs, etc., just like Safari. I'm not tied to iCloud for this, though it'd be nice to use iCloud and not yet another cloud syncing mechanism.

Lastly, migrating is a pain. There's apparently no way to import my current Safari session (I have probably 60-70 tabs) or history (I keep everything I visit, going back years), which means I'd lose stuff by migrating and would have to migrate tabs over incrementally. Hard to try out a browser in any meaningful way this way.

Here's a few things Firefox could do to interest me:

- Make super-sleek platform-specific UIs that feel native. Do you really need a platform-agnostic GUI toolkit for the chrome? The renderer is the portable part. I don't care about theming myself, and wouldn't miss it if my browser didn't have it (Safari doesn't). I prefer an opinionated browser that knows what it should look and feel like.

- Innovate by addressing actual user pain points. Containers are an innovation, but they target techies and fail the grandmother test. I'd like true containers, where every 2nd-level domain is contained. This means having to be innovative about how to address cross-origin things (Google spreads itself over many domains, and then you have things like OAuth).

Another huge innovation you could bring to the table is to fix the user identity and authentication problem. I use a password manager, but why are we still logging in with user names and passwords these days? Why is the password manager using brittle form fills rather than APIs, for God's sake? Here's my solution: When I go to Reddit or whatever, and I'm logged out, what if my browser showed a little bar at the top that said: "This web site would like to use your profile 'Atombender'. [Accept] [Ignore]". On accept, browser and web site would negotiate through some kind of opaque, cryptographically secure token (via some plugin API so that providers like 1Password and Apple can store your state) so that the browser can prove that I am me, and the web site can prove that it is itself. No more phishing, no more remembering passwords. Web sites can only identify users that you've granted access to your identity to, and like ApplePay your true identity should be hidden behind an opaque identifier. Standard protocols could be defined for things such as email addresses and phone numbers, so that I can edit the email for my profile locally, and it would automatically make an API call to the web site to update the email address on that end. Things like deleting an account, setting up 2FA etc. would be part of this API. Of course, to accomplish this you have to design a standard and make web sites use it. Mozilla used to have enough clout to do this, anything is possible.

Another area where innovation is needed: Fix the tab problem. Bookmarks, tabs, windows -- we can do better. Why isn't a tab and a bookmark sort of the same thing? Why is bookmark editing so bad? Why do bookmarks get broken when the web site disappears or changes? A bookmark should save a complete copy of that page!

And why can't I search my history of visited web pages? I remember reading an article a few weeks ago. It mentioned Charlemagne's reign but the title was about something completely different. I don't remember anything else. How do I find it? Browsers only record the title and URL and visit time. Why can't I search for "Charlemagne" in the browser and get a hit?

- Firefox can interest me with great performance, but Quantum has been disappointing on macOS. I remember the standalone WebRender (?) demo app a few years ago, and it was insanely fast. Maybe because it had less legacy baggage. Firefox could charm me by using significantly less RAM and less idle CPU.

- Why don't browsers have adblocking built in? I use 1Blocker, and it has a clunky UI where you can point the cursor at a page element to block that specific element. This could be made so smooth.

- To catch more developers' mindshare, Firefox could develop a super-modern, low-resource-usage Electron competitor with some kind of easy (gRPC?) glue for interfacing with languages. Join forces with Slack to make it happen.

Just some ideas. I don't pretend I know better than the Firefox team, and I'm just one data point, of course.

But like many people I see Firefox as being increasingly less relevant. I don't see this as being caused only by the ascendancy of Chrome, either.