For the longest time, Mozilla was synonymous with the Firefox browser, but for the last few years, Mozilla has started to look beyond Firefox, especially
one passage of note:
Where does all of this leave the Firefox browser. Surman argued that the organization is very judicious about rolling AI into the browser — but he also believes that AI will become part of everything Mozilla does. “We want to implement AI in a way that’s trustworthy and benefits people,” he said. Fakespot is one example of this, but the overall vision is larger. “I think that’s what you’ll see from us, over the course of the next year, is how do you use the browser as the thing that represents you and how do you build AI into the browser that’s basically on your side as you move through the internet?” He noted that an Edge-like chatbot in a sidebar could be one way of doing this, but he seems to be thinking more in terms of an assistant that helps you summarize articles and maybe notify you proactively. “I think you’ll see the browser evolve. In our case, that’s to be more protective of you and more helpful to you. I think it’s more that you use the predictive and synthesizing capabilities of those tools to make it easier and safer to move through the internet.”
One of the few remaining browsers in 2024 that does not support profile switching (and no, a debug about:profiles page does not count as supporting profile switching), and sure, AI is absolutely what it needs right now to become relevant. /s
Unfortunately not, that doesn't meet the needs for either a different user, or a completely different use case. For example, I want to completely separate my work profile with a set of extensions, and my personal profile with a completely different theme and set of extensions. In most other browsers you simply click on your profile picture and choose "Switch Profiles" or something. Not Firefox nor its derivatives.
Firefox has a profile manager (the thing that's also exposed to about:profiles). Run it like firefox -profilemanager and you'll get a profile switcher.
Run firefox -profilemanager -no-remote if you want to open multiple different profiles at once (only the original one without "no-remote" will open new tabs when you click on links outside the browser). You'll probably want to make a shortcut for different profiles though, not sure from memory what it is (but probably -profile ProfileName) and then you can easily use profiles.
The support is actually pretty decent, just kinda hidden. You don't get a profile switcher because the browsers are completely separate, they don't really know about each other.