I like the idea of that, but, Mozilla is absolutely abandoning what made Firefox amazing.
They are embracing this strange thing where they think that they are a for-profit app platform, like Google, when they aren't. So they're locking down their web browser.
It makes sense for Google to do that. Not Mozilla.
Firefox is supposed to be like emacs. Should emacs need permission from some central authority to install an extension?
Many of Google's UX methodologies make zero sense when Firefox implements them.
It makes sense for Chrome to be locked down and customizable. It makes sense for iOS to be locked down.
I'm not thrilled about it, but it makes sense to maintain the control and integrity of the platform, for a business perspective.
But there is no reason to do it for Firefox whatsoever. I should really document this, but, I have an entire set of Firefox profile "distros" that I use for some very specific purposes, with Firefox. And they're slowly being phased out. Because Mozilla is a cargo cult.
This would be like if Ubuntu decided to forbid you from using apt to install anything except by authorized repos, in order to be more like iOS. Because people like iOS. So if we superficially copy them, we will inherit some of that magic.
Technical decisions for Chrome are often made pragmatically, like, they will decide to use a native pdf reader instead of a javascript one, purely for performance reasons, even if it is a step in the wrong direction for portability. That is a business decision, and the same as any number of Microsoft's inconsistent implementation decisions for Internet Explorer. You don't have to COPY them. Maybe try offering an alternative?
And let me be clear: at Mozilla, they FETISHIZE Chrome. The sole justification for removing FTP support from Firefox[1] was a single pasted URL from Chrome's bug tracker announcing that Chrome was removing FTP support.
Google doesn't even have to try. They lead Mozilla around by the nose. Google could announce that they were removing the address bar, and the sycophants at Mozilla would have already officially announce that they too were deprecating the address bar as being obsolete, because Google said so.
We've already lost. We have a one party system.
[1] https://bugzilla.mozilla.org/show_bug.cgi?id=1174462